I have a pair.of stock 350 heads. Casting number is 3932441 says its from a 1967-72 motor intake 1.94 exhaust is 1.5 says intake flow is 152cc exhaust is 93.2cc.
Well my question is what could I do to these heads to improve them. Please don't tell me.to buy new ones bc I.don't have the money for that atm and I don't want newer heads for this build. So if anyone has anysuggestions that would be awsome.

 

well from what i have seen online , these heads have 9:1 compression?
is this true?
if so i wanna use either the comp cam extreme energy cam or the thumper cam.
thumper cam says i need atleast 9 to 1. the motor itself is a 1978 350 with as from what i know is still stock. so will my engine still get the 9 to 1 or no? so,e help would be great !