I picked up a running 2 bbl 272 out of a 55 that I think is original to the car put in my 55,my 55 originally had a 4 bbl version that I am going to duplicate but with a 57 4 bbl intake and 62 distributor and from what I have found there are different head casting numbers for a 2 bbl and 4 bbl so does the 4 bbl heads have a smaller combustion chamber or is there different pistons too. I presume this 272 has the original 2 bbl heads and can get a set of the 4 bbl heads so will that all I need to raise the compression to the 55 4 bbl specs,I do have a set of 62 heads that are supposed to have a slightly higher compression (8.8 vs the 55 at. 8.5) but has smaller intake valves.


Butchering up everything I can get my hands on in Dayton Ohio