340 stroker 422

Cometic has head gaskets up to .080 at least, contact them and see if they can accommodate your bore.
Or have the pistons shaved to get the CR where you want it.
Cometic did me a .100 thick.
Unless you did a downfill on the cylinder you don’t really know what you have.

IMO, for your displacement you are at least 15 degrees too small on your cam timing and probably 3 degrees too wide on your LSA.

What heads are they?
He said nicely done RPM’s which leaves a little to the imagination. If he still has the 2.02 valves, a 104 LSA would be in order. If he has 2.08, a move up 1 is the math. If I did the math right.

The increased duration is a look for more overlap I assume?

@Miszny, do you already have the camshaft?
The cam you have listed above is right around a nice street grind and really doesn’t require a lot of compression.

Go through your math again on compression and see what you need for head gasket thickness to drop it some.