Offshoreonly.com - Head gaskets

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I am looking for a thinner head gasket than the typical .039 thickness for a 4.29 bore mark iv 454, like around .027. Cometic makes a marine series, but all the bores are 4.5 and larger. The non-marine gasket has basically the same description, "stainless steel layers", so I don't know what the difference is. Would the non marine gasket be ok? I boat in salt, brackish, fresh water and flush typically after every ride.

Non-marine version:
http://www.summitracing.com/parts/cg...make/chevrolet

Marine, but larger bore:
http://www.summitracing.com/parts/cg...make/chevrolet

Any other sources of a marine head gasket in this thickness for a .040 over 454? They seem to be hard to find, and twice the cost.

Thanks

Call Cometic direct, they will make you whatever you want!!

can tell you felpro "marine" gaskets the only difference is the package...guy at felpro told me this...even their gen VI oil pan gasket, they buy from GM and repackage...just happen to get a tech guy who was strait up one day

All, I called them and they told me they are both made from the same stainless.
Thanks