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

Can't answwer your questions, but "link" from this site to John Mummert's site.. Then go to his Cylinder Head I.D' s section. You'll likely find what your looking for there..


Paul

Here is an excerpt from MUMMERTS chart regarding the 1955 272CI -



The 1955-57 272 used the same piston.

Maybe ID both sets of heads (CASTING ID NO - DATE CODE - FOUNDRY MARK) to see what you have?

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Going to pick up the engine next week and see exactly what I have.


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