273 commando Build

So, if these are the head gaskets they were on the 65 273 from factory the compression ratio should still be quite high.
here is another question >>
which would be better to use to acheve max compression on the commando ? The above oem gasket or the mr gasket 1121G bore 4.141 and .028 thick ?
sacrifice bore size or thickness or would they be pretty much equal ??