340 Piston and Valve Question

Garrett Ellison said
I recently ordered a set of these head gaskets from Amazon.
Composition Material Cylinder Head Gasket - Up to 4.125" Bore - P4120094
If you are wanting to maximize your compression, these are the way to go.
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It's too bad that these Mopar ones aren't available in their original form, part # stayed the same but their now a 40-42 thou composition offering!