im gunna build a 331 and a buddy suggested these heads dont know much about them. just figured afr 185's would do well. im trying to figure out what head to go with when i order the rotating assembly so i can ahve the pistons cut. here is what i want. motor should be around 10:1 compression with the 60cc vics i know the flow awsome out of the box just might be to much. btw it will ahve a power adder 150 shot. thanx if you have any input on this and what the combo's netted thanx.