Sorry to jump into an old thread but this is right around the question I’m trying to figure out. My 318 is running the larger valves 2.02 and 1.60. The heads were ported a bit by the previous owner. He states he “gasket matched” the heads and intake the best he could but isn’t a “pro”. I haven’t had the motor apart to closely inspect but it does seem snappier than I would have thought. My question is this after reading this thread I’m still not sure if I should go after a set of local 340X heads and start porting etc or is that not worth the squeeze with a set of worked 318s I have? Sorry if this is repetitive just learning here.
