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Chevrolet 454 V8 Engine

In 1970, GM pushed the performance bar higher with the introduction of the Chevy 454 V8. Unlike the popular Chevy 427 that was used in a wide variety of automobiles, the 454 was used only in high performance cars like the Chevy Camaro, Corvette and Chevelle. There were 3 different variations of the 454 that came onto the drawing board at GM during the 70s; the LS5, the LS6, and the LS7 which was designed but not produced for the general public most likely due to the massive smog restrictions that started lurking about in the early 70s. . Although the LS7 454 never made its way into any cars sold to the public, it was sold as a crate engine available through Chevrolet and claimed to produce around 500 horsepower.

The 1970 production models of the 454 put out the most horsepower with the LS5 claiming 360 horsepower and the LS6 putting out a mighty 450 horsepower. As with many high performance engines during the muscle car wars, there were lots of rumors flying around in regards to actually how much horsepower the 454 engines put out as opposed to what Chevrolet was reporting. Some say that both the LS5 and LS6 454 motors were underrated by about 50 bhp. Of course this has never been officially proven but it could be a good argument for discussion.

Unfortunately the Chevy 454 was the right engine at the wrong time. Uncle Sam started to tighten down on emission controls in 1971 which affected a lot of the power of the 454. Another big blow for the 454 was the gas crisis of 1973 which pretty much sealed the fate for the motor during this period. The last Chevelles of 1973 used the 454 but by this point the engines had been toned down to a measly 245 horsepower. The Corvette followed suit by the end of 1974 and also bid farewell to this once powerful engine. The good news is that the 454 didnít completely die after 1974 but was used up until 1996 in many Chevy heavy duty trucks. More good news is that today the 454 is one of the favorites among Chevrolet performance enthusiast which means that there is an ample supply of engine parts available for the 454 that really push the horsepower on these engines easily above the 600 bhp mark.

Comment Script


Can you tell me what these casting numbers in the back of the block identify? 1006286. What year? What size block we think it is a 454 1970 le 6 or 7? Thanks. Tom
#60 - Thomas Fox - 01/22/2016 - 22:16
freeze plugs...
How many freeze plugs are in a 1977 Chevy Silverado truck, 454 v8
#59 - Leslie Walker - 10/26/2015 - 20:17
I have a 1992 454 and need to know if I have to remove the radiator and a/c condenser to change out the water pump? Someone said that you have to be careful that you get the right water pump because there are two and if you get the wrong one it will not work, I also need a diagram of how the belts are configured. Thanks, Lyle
#58 - Lyle Albaugh - 09/22/2015 - 02:14
454 Chevy motor
I have a 454 Chevy and it doesn't have the airflow on it and I need to put it on the motor to pass smog how do I put it on and where dose it go on the motor
#57 - Lorie Garey - 07/27/2015 - 15:07
OIL for Chevelle
What oil should be put into a 1970 Chevelle LS6 SS with the 454 engine ????? I will NOT be racing it.
#56 - tom chain - 07/09/2015 - 20:32
Grumpy as Ever
I have rebuilt a few 454s and got quite the education
In the prosess..... One of the most important things to remember is that the Rat 454 is an externally balanced engine. It has to have a 454 fly wheel
To match up with the crank.... A 427 or 396 will bolt up but it will not be balanced. And you will have a shakey ass ready to blow motor if not balanced.
Dig it !!!!! And I didn't have one but I've heard the
454 Block also comes with a 2 Bolt Mains
To bolt the crank shaft.... You would want a 4 Bolt
Mains system.. If your want to built the "real deal"
Also if you are going to spend more than a dollar
Do have the "Line Bore" checked by a pro-shop
This is a must.... If you are going with a more radical Cam Shaft and lifters..... You will have to have your pistons notched or butter fly cut for the clearance..
Might as well port and polish the heads with your compitition valve grinds too, don't you think ?
Your going to need a few more quarts of oil for the high RPM that you will be asking from her...If I was sure the big oil companies weren't going to cut the gas off again , I would be happy to give you a hand,
But good lucks all you get for now... Keep
A good eye on those valve keepers ! LOL
#55 - Robert - 02/15/2015 - 11:20
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454 block
I have a 1970 ls5 corvete 454 ratt motor block and would like to know how much its worth plz
#49 - david quigley - 09/15/2014 - 23:13
#48 - EDWARD - 08/21/2014 - 13:49
Got an engine and would love to know what year it is, what it is and what it came out of. Numbers on it are: B28 77, GM 10 T, G61959.
#47 - Fred Hoffman - 08/19/2014 - 19:51
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I have a 454 HI pef pass on back of block with vin CES159795 can you tell me any thing about it thank you
#44 - Paul Norris - 08/08/2014 - 23:52
Thanks for the torque value.Looks like this will be an LS5,6or7:-D
#43 - bobbymac - 08/03/2014 - 23:40
95 chevy dually 3500 hd 454 engine
Need a computer prom for a 95 cheverolet dually 1 ton gasoline with a 454 engine two wheel drive....can anyone out there help me....
#42 - fedel - 03/05/2014 - 18:17
horsepower and lbs of torque on 1998 chev k3500?
#41 - bob - 02/05/2014 - 00:35
I know the answers too some of these
#40 - stephen h, warren - 01/23/2014 - 05:55
Timing Degree on 84 Big Block 454
What is the degree on the timing while using a timing light to adjust the distributer.
#39 - Al Hedge - 11/27/2013 - 01:09
What does the T1106ASA stamping indicate that is located on the front pad above the timing cover. I specifically want to know what the ASA means.
#38 - Bill - 07/27/2013 - 23:55
master mechanic
454 A-8-75 with casting number 3999289 ,what are the casting numbers for the heads that came with the block . Is there a smaller chamber head I could use to up compression? Anyone with a pair of original aluminum heads for this casting? Let me know a.s.a.p.
#37 - George Therrien - 05/18/2013 - 04:25
97 454 rebuilt from dealer any one know horse power(stock 30 bore)
#36 - joe - 04/03/2013 - 13:06
Have a 7 Chevelle with 454 and wondering in someone know average speed in mph at rpms. Not sure of the rear end
#35 - corkey - 01/22/2013 - 02:08
1977 GMC 25 sierra grande camper spesial
Just got my hands on an 1977 GMC sierra grande here in Norway. It has a stock 454 chevy 454 in it. The car was delivered with this engine and it is original non- tuned.
What does this engine perform, end do you have a suggestion for a good intake and carb set-up for this engine to make it run good?
#34 - Per Opheim - 01/13/2013 - 15:29
454 engine #14015445 can you tell what year and what it is oiut of
do not know year or what it is out of or engine size
#33 - frank - 10/07/2012 - 19:55
just bought a 1969 pick up it has:
suffix code: t1128pcj
block: cse13700s
heads: 10114156
intake: 485889

can you help me identify this combp please
#32 - andy ford - 09/17/2012 - 18:43
what can you tell me about GM 454 Serial Number 00065852? Is this new or rebuilt?
#31 - john westgate - 09/16/2012 - 15:52
Do your own homework KIDS
I have never heard so many ignorant questions in my life. Lots of young kids hear. Mike as far block integrity I too have pulled threads on # 6 and some others,I recommend time serts and ARP stud kits helicoil is a gamble but will work just hard for reuse if ya gotta pull it again. This was the only REAL question i read here. good luck boatman
#30 - hotrodtodd - 08/09/2012 - 13:11
GM 454
I have a 454 with the casting number 361959 P and GM T12

Can you tell me anything about this engine?
#29 - cappy bisso - 07/25/2012 - 02:54
Org. # Matching LS7 454 Crate Brand New
Org.#matching LS7 454 Crate Brand New. Pre-served. What would it be worth?
#28 - Ron - 07/23/2012 - 00:53
i got an engine 454 from dulie its a 1977.. how much horse power does it have stock? and that same engine with a 3 inch intake and a 750 carburator holley with heters? how much horse power can i have with a mautains trainsmition?
#27 - Martin - 07/03/2012 - 16:56
454 question
HI i have a 7.4 engine with casting of 14015445 and engine # of cf3310058 can you tell me what the spec are and what it might be out of thanks cliff
#26 - cliff - 06/21/2012 - 17:09
doing a 454 vin# 14015445
casting number T0125PLA
01 = January MFG MONTH
25 = MFG DATE Actual
The PLA can not be fond to tel me the Specs

Thats like Brian #19 with Engine VIN# 3963512 does not have a 71 454 it is a 427 look the vin up up 3963512 1969-71 427cid 335, 390, 400, 425 COPO, 430, 435,
so my question is what do the casting letters PLA mean
#25 - William Beasley 1 - 05/23/2012 - 09:07

283 Rear Wheel HP for that "mighty" LS6 on a chassis dyno.

My 305 HP (SAE NET) '99 LS1 Camaro put 298 HP down to the wheels in 100% bone stock condition.

The 454 Chevelles ran around 4,100 pounds with a driver and a full tnak of gas. Bone stock production examples would have been trapping at 117 MPH or so straight off the showroom floor is they "really" made 500 HP.
#24 - Bob - 05/15/2012 - 23:39
need a diagram of a/c compressor placement for a 1987 454
#23 - leo Klein - 05/07/2012 - 19:57
Did the 1970 LS 6 Engine come with solid lifter cam.
#22 - Steve Corey - 04/30/2012 - 19:56
1983 suburban
I have a 1983 suburban and the motor is a 454 and it sounds like a diesel engine is it supposed to sound like that. thanks!
#21 - Lewis Ragland - 04/30/2012 - 01:46
ive got a 454 tying to find year and specs on....GM T14 14015445 P and HIGH PERF PASS is only thing i can find on block.....WAS TOLD IT WAS OUT OF A 72 SS...NOT SURE
#20 - josh - 04/29/2012 - 17:00
HELLO. I was wondering if you might be able to help me out here... I bought a 1988 Winnebago-Elandan (37 RQ) motor home with 454 engine. I'm, trying to find out the specs on the block, What it was from. HP, Manual, etc... Any help would be greatly appreciated! Regards, Sam

#19 - Sam Akramov - 04/17/2012 - 03:40
Assistance needed...
Hi, I was wondering if you might be able to help me out here... I bought a 71' 454 block Casting # 3963512, GM T7, and the front pad reads T05242D0. I'm, trying to find out the specs on the block, What it was from. HP, etc... Any help would be greatly appreciated!

Thanks- Brian
#18 - Brain - 04/10/2012 - 14:50
Need to know what country GM moved production of 454 and 502 engines. Have possible block integrity issue on 2000 Mercruiser 454 MPI 425hp. Closed cooling motor (heat Exchanger) Broke ARP headbolt off at #13 position of odd bank. Block threads disintegrated at #6 position, (second pass 55 lbs.) Torque done with Snap-On digital certified torque wrench.
Thanks for your
Engine Dynamics Inc.
#17 - Boatmike - 04/07/2012 - 06:56
I have a 78 454 truck blk bored .30 over in my 48 chev coupe. I runs hot (220 at idle). Have a 4 core Griffin aluminum rad.,16" Zerg elec fan puller. have mild comp street cam. What should this be timed at as I heard it may be too advanced causing it to run hot. It runs smooth at 20 tdc.
#16 - Gerald Unger - 03/25/2012 - 17:26
I have a 454 in a c/k3500 it has a manual trans I am putting in a auto 4l80e and I what to know can did this motor come with two differant cranks. Steel or cast
#15 - Duck - 03/14/2012 - 18:55
i hsve 1974 454 block 3999289 heads 336781 what is my hp? what do i need to do to upgrade hp
#14 - bobby - 03/06/2012 - 10:58
I have a 454 bored .030 block # 14015445, engine vin CF3315409, cylinder head casting #14081045,date code CFD 340. I need to know year and specs please.
#13 - Matt vallely - 02/20/2012 - 07:16
BB Brackets
I have an LS6 and want to run A/C and P/S. Where can I find a picture of the proper brackets I need?
#12 - Wayne C;asen - 01/30/2012 - 22:37
I have a 454 believed to be from a truck? I hve some head work done and roller rockers 1.72, springs, etc. I have an 830cfm holley race carb, team g highrise intake, msd ignition, a howards cam 237/246 duration and 618 lift, rpm 2400-6400. Moroso 8qt w/high volume pump, b&m 2500 stall, and a powerglide. Hooker comp headers 3" exh, to half car. WHAT HP Might I have?
#11 - Dominock - 01/27/2012 - 04:58
junk yard
The 1977 454 has the open chamber heads I would deck the heads 0.015inch u will need new pistons with a 20cc valve release that would make it have a 9.25:1 compression ratio just perfect for pump gad
#10 - trevor - 01/10/2012 - 14:19
Junk yard 454
I came across a 454 at the junk off of a 1977 chevy truck. I proceeded to bore it out 0.30. Should I deck the heads for a smaller compression ratio or keep the heads stock for more power?
#9 - Juan - 01/10/2012 - 00:43
looked 1970 chevelle with 454 but first time i've seen each plug wire grounded seperately to the bolts on the valve covers...any comments or thoughts??
#8 - mike fine - 12/26/2011 - 22:43
power for a 454
i have a 1987 454 came out a motorhome what cam n lifters i need n what pistons will make me alot of power for this motor
#7 - brandon - 12/25/2011 - 12:47
I have a 1975 airstream motorhome.. with 454 can you tell me the kind of 454 and the belt configuration.. Does this motor have a smog pump?
#6 - james trivett - 12/11/2011 - 03:41
454 water pump/block bolt pattern
what is the bolt pattern on the block for water pump mounts
#5 - keith clark - 11/25/2011 - 21:26
GM 454
I have a 454 with the serial number 361959 P and GM T12

Can you tell me anything about this engine?

#4 - Allen - 10/02/2011 - 23:43
engine numbers
im trying to find out what engine I havehere are some numbers,14015445, 990 heads,(1DO4XCH8)I know its a 454 just dont know which one, Thanks.
#3 - Carmine - 09/25/2011 - 15:58
I'm trying to find out if the chrome air cleaner and chrome head covers were standard for 71 Stingray or optional
#2 - Clive - 08/31/2011 - 12:19
i am looking for spec sheet on crate engine #3965775 2-22-73
block 14015445
head 14096188
intake 3933163
#1 - steve castelli - 07/26/2011 - 23:59
I would like to know if my engine is an Ls7 the block #'s are9993820 and the engine Vin. #'s areT1105CXA and the head #'s are399289 I know that the heads were produced Jan. 28, 1971
#0 - joe - 04/22/2011 - 20:16
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Engine Specifications

1970 LS5 with 4 Barrel Carb
Max Brake Horsepower - 360 @ 5400 rpm (Chevelle)
390 @ 4800 rpm (Corvette)
Max Torque - 500 @ 3200 rpm (Chevelle)
500 @ 3400 rpm (Corvette)
Stroke - 4.00
Bore - 4.251
Compression - 11.25
Firing Order - 18436572

1970 LS6 with 4 Barrel Carb
Max Brake Horsepower - 450 @ 5600 rpm
(Chevelle and Camaro)
Max Torque - 500 @ 3200 rpm (Chevelle)
500 @ 3600 rpm (Camaro)
Stroke - 4.00
Bore - 4.251
Compression - 11.25
Firing Order - 18436572

1971 LS5 with 4 Barrel Carb
Max Brake Horsepower - 365 @ 4800 rpm
Max Torque - 465 @ 3200 rpm
Stroke - 4.00
Bore - 4.251
Compression - 11.25
Firing Order - 18436572

1971 LS6 with 4 Barrel Carb
Max Brake Horsepower - 425 @ 5600 rpm
Max Torque - 475 @ 4000 rpm
Stroke - 4.00
Bore - 4.251
Compression - 11.25
Firing Order - 18436572

1972 LS5 with 4 Barrel Carb
Max Brake Horsepower - 270 @ 4000 rpm
Max Torque - 390 @ 3200rpm
Stroke - 4.00
Bore - 4.251
Compression - N/A
Firing Order - 18436572

1973 LS5 with 4 Barrel Carb
Max Brake Horsepower - 275 @ 4400 rpm
Max Torque - 395 @ 2800rpm
Stroke - 4.00
Bore - 4.251
Compression - N/A
Firing Order - 18436572

1974 LS5 with 4 Barrel Carb
Max Brake Horsepower - 235 @ 4000 rpm
270 @ 4400 rpm (Corvette)
Max Torque - 395 @ 2800rpm
380 @ 2800 rpm (Corvette)
Stroke - 4.00
Bore - 4.251
Compression - N/A
Firing Order - 18436572