Piston clearance

Gentlemen,
I’ve got a question about piston to head clearance. I’ve got a set of edelbrock 63cc heads that I want to put on my 340, the pistons sticks up .020 I’m using felpro head gasket .057 thick which leaves.037 before compressed height. Edelbrock says .035 clearance should be maintained at the minimum. Can I run with less clearance or should I go with the 65cc heads?
Any advice would be greatly appreciated.

thanks in advance
Kevin