I have a 1968 Le Mans the heads are off can I just measure the bore and tell if it's a 400 small block
One of the heads are cracked and I need to get a set but first I need to know what I have that way I know how much I should put into it. I mean if it is a 400 then i may get a set of alumininm heads. or whatever may work best.
there is a number between the middle cylinders and there are charts on web sites to tell you what kind of head you have
could also be a leter number combo i know i had (16) heads on my 68 gto, which was right fot the numbers matching wt engine that was in the car giving that 400 engine 10,75 to 1 compression ratio
You could measure the bore. A 4 in. Bore is going to be a 305-350 and larger could be a 400 but im not sure on the number for the 400.
if its a pontiac engine the size is stamped on the side of the block.
check out www.yearone.com for engine ID numbers.
if you want a used set of heads or other parts check out www.frankspontiacparts.com
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