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Head gasket options

February 10 2018 at 7:39 AM
chillymerc  (Login chillymerc)

I tore down my 390 yesterday, had FelPro 1020s in it. I measured the deck clearance at .015", need to get a bit better straight edge and double check today but let's assume that number sticks.

4.080" bore
3.78" stroke
.015" deck
4.40" HG bore
10cc valve reliefs with TRW 2291 pistons
76cc chamber
I come up with 9.14:1 compression

I'm just swapping heads, no machine work or piston swaps in the plan.

I'd like to find a 4.30" HG bore, .030" thickness head gasket, which will give me around 9.4:1

I realize this won't mean much at all for making power, but just figured I have to buy new gasket anyway, may as well help it a little and bring quench in a little tighter.

I can't go Cometic because the deck surface wasn't prepped for them. Edelbrock sells a 4.330 .038" head gasket, anyone know of other options?

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