Mopar Small Block Head info:

All the guys who just homeported the 302s on this site and didn't have a lot of chamber unshrouding done and I mean a lot ..and a flowbench test...their heads might only do as good as stock 675 heads.

My 302's with a 1.9 11/32 valve went 242 cfm @ 550 lift with a little unshrouding.