Milling 318 Heads to raise CR

Hmm . . .no NOS on my 'teen. I enjoy being able to use my pistons as ash trays when I decide to upgrade. I'm just keeping it an all motor car . . . maybe turbo? lol Untill I find a '65 or '66 Dart this'll do me just fine.

Has anyone calculated their actual compression with a stock 318?
I think I'll just mill them 30 thous, toss in some 30 thous rocker shaft shims, mill the intake 20 thous and call it good.
I'll keep you guys updated. If I can run mid 13's once I throw in a posi and 3.55's I'll be happy.