Which heads for my 318 ???

My 360 mayyyybbeeeeee makes 320 at the wheels, and it has new everything, eddy heads, headers, 11:1, good size cam etc. Don't strive for a HP goal, build the engine for what you want to do with it. Also a good converter and gears make a huge difference, I have 276 rear gears and the combo sucks! 3.91 going in instead.

X2 on the 273 adjustable rockers, those would work good for you.