Curtis you crack me up LMAO,
First of all i'm a procomp dealer, and the add is an outright lie. Direct Motion in Ca. does the CNC porting of these heads for procomp. They are in fact 320 cc runner heads as cast and the most flow that DM has been able to get is 373 cfm. ProComp does not make a 360cc runner head. the spring pressuse will not allow you to run a solid roller cam.
Hammer save your money, unless you think you have to have these heads i'll sell them to you cheaper, but the warrenty is invalid right after you open the shipping box.
Zip.