440 Source big block aluminum heads

Ive got a set they look good with a lot of meat(for milling or decking) they are supposed to be good up 600 lift I cant remember what the stock flow chart said but Im putting them on a 10/1 40 over 440 with a tunnel ram with two 600's. The cam Ive got is a 605 lift solid lifter. I hope to be putting it together before spring. If i do Ill post what I can about the heads.