408 stroker head gasket recommendation

autoxcuda said
I don’t think you’ll be able to run 91 octane on true measured 10.7:1 compression. But maybe with a large cam

If he runs high duration cam won't that bleed off some dynamic compression? Also quench comes into play too which he didn't say what quench he will end up with. But yeah might have to mix in some race gas or add octane booster when he fills up.