i have a 331 stroker that im putting together and i was planing to go with afr 185s. now that it has come down to me getting the heads im not sure which heads i should go with i saw specs for dart pro 1 195s and they seemed to be a go head. which is a better head, or is there a better out of the box head i should go with. i plan to shift no higher than 6500 rpm if that.