Stockish 340 upgrades, cam needed

If he still insists on the CNC heads, give the port window at the intake face dimensions so I can get some idea of how much to crutch the compression to make it play nicely at low rpm. But, he needs to know if it's made to work as intended at low rpm, it's not going to work well at high rpm unless he gets some 98 octane fuel or better in the tank.