Fobra

IMO built 2v heads > then stock 4v. (they are about even, but youll get more out of race 2v heads). If your going to do a 4v swap and then port and build those then 4v>2v. You can also go somewhere in the middle, with arguably just as good performance as ported 4v heads but much more reliability and less cost with ported 3v heads.

Dteal23

id say get a blower or h/c/i with spray... dont wanna use all the power dont step on the gas