I have a 1990 Chevy V6 thats just about dead & i have a chevy brand new rebuilt 307 V8 .Will it mount in my 1990 chevy K1500 4WD 1.5 ton Automatic Trans. Is there any way to get the 307 V8 to run in my 1990 body . This truck came in a V8 also could i buy a Elberbrock intake for the 307 V8 so it will run & i know i will have to change the computer from a V6 to A V8 it this impossible or could we do it my buddies know thier stuff about autos thats all they have everdone is work on cars & trucks if it not a big problem contact me & see if this is insane or can be workedout for me

Timothy,

The 307 will fit in your truck just fine.
You will need a different starter, but otherwise, everything should bolt up just fine.
If you don't wanna mess with the computer, dump it and run a 4-bbl (works fine).
Edelbrock intake ok, but check with your local GM dealer. The old LT-1 intake from the early 70's are still available (NOS) in some places.

I recently picked a used Chevy 307 that was in a 1973 Chevy Nova, it has the original two barrel carburetor. I out in in my 1971 GMC C2500 Truck to replace its original 307, after driving for 10 miles it began to pop and back fire and would not accelerate. Is stopped and adjusted the points in which it worked for another two miles. After replace the points I have not been able to get it to start. I checked compression and all cylinders show between 58 and 62 psi. There is spark at each spark plug though my exhaust is clogged and i think my carb leaks a lot of fuel
Am I accurate with believing that carb leak is the problem

I had put Autolite Platinum AP25 that came gapped at 0.045 set the points a 10 thousands trimming at 8 degrees because it would not run at 4 degrees. Worked good until you a load on it. I had changed the gap on eth plugs to 0.35 my timing bounces between 10 and 12 degrees and runs better after adjusting the points to 18 thousand. it won’t start after warm up unless I hold the choke and accelerator at 25%

Considering buying a 1971 Chevelle with a 307 motor. The owner replaced the 2 barrel carb with a 4 barrel - is this a good thing?

ATTN Tori Stephens
I have owned a 1970 Chevelle with a 307 for 19 years. The 4 barrel carb is a good thing as long as the right size carb was selected. Bigger is not better it is easy to over carb an engine. Sadly I was forced to make the 4 barrel swap in the late 90's too. The 2 barrel carbs are wearing out the cores are old and subject to cracking and metering rod problems. I went through 4 rochester 2 barrels rebuilt by holley in their factory in a month and a half before I realized this truth and had to make the swap to a small edelbrock 4 barrel. Unfortunaley nobody is making new castings of 2 barrel carbs which is what is needed to keep the 307 in "original" running condition. The small 4 barrel I have on mine have worked very well for many years don't let the 4 barrel carb discourage you. It is a necessity to keep these cars running well

58 to 62 psi in compression is a dead engine. Anything less than 100 psi I would not expect to start. Even compression as low a 120 psi I would consider a very worn 307. My 307 ranges between 150 to 155 psi in all 8 cylinders. If you read my previous post you are already aware of the problems you may run into with an old 2 barrel but in your case I would say you have a serious compression problem and any presence of fuel wetting your plugs does not necessarily mean you have a carb problem but simply not enough compression to fire. A gas engine needs 4 basic things to run: sufficient compression, fuel, air and spark