stroker402 said

tmm.
I received the 273 commando head gaskets today #2463 338 , far and behold they are not what people say they aim to be. p/n 2463 338" Is NOT a steel head gasket , it's composite . the bore is not 3.63 it is 4.0 and the thickness is not .021 it's .041. I think there never was a steel head gasket produced for the 273 . first of all >>>>>>>>>>>> #2463 338 is a composite gasket not steel Here is a quote >
General Information
Near impossible to find a set of Original {.020"} Thin-Steel Head Gaskets {#2463 338} for the 273 4-Barrel.
they used on the 2bbl as well. That's what they used back then.
I DON'T THINK SO !

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stroker402 said

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 ??

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