I'm thinking of getting a set of Mummert heads for my 312. My question is:
The block was machined with the pistons .020" in the hole for the use of shim head gaskets rather than zero decked for composite gaskets.
Can steel shim gaskets be used with Alum. heads?
Will using composite gaskets give me too much quench clearance (volume) with .020" deck clearance?
Thanks.


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