Depends on which heads your gonna use, don’t listen to these nay sayers obviously if you give a 318 enough air flow and Cr it’s gonna be able to make power.
I’m gonna stick with my J-heads for that goal but if I throw out the desire for boost on this engine I plan to move over to my R/T head which I haven’t started hacking on yet. I will pump my prediction/hopes/dreams up to the magical 340whp....