Piston ring indexer?

Looks like my choices for head gaskets for my 273 commando build are Mr Gasket 11216 with compressed thickness of .28" and the standby Felpro 1008 with the compressed thickness of .39". With stock heads and Egge 10.5 pistons any advice? Lunati cam about .460 lift and 220 duration near as I can remember.
DR