Running the Impala = 0.029 or the Mr Gasket 5716 = 0.026 head gasket will give me compression ratio i need to get but my question is are these safe to run on a medium cammed motor, no boost or nitrous. I see they are thinner, will that affect their life?

Also my bores are at 4.030 so will that matter? Do I need to find head gaskets for 4.030? ( The Mr Gaskets are "Head Gaskets, Ultra-Seal, 4.100 in. Bore, .026 in. Compressed Thickness, Chevy, Small Block LT1, Pair ")

thanks

 

Either should work just fine.

 

I am running the Impy HGs from GM parts. I have a cc503,1.6 rr, blah blah