318 value

Dan the man said
Since my personal goal is not making a bunch of power, I'm thinking around 300 @ the flywheel, but mostly improving the throttle response and low to midrange torque. I don't think that I have to be concerned about bigger valves and such. I think that port velocity will probably be more of what I need. I've read up on the use of mopars swirl port 302 heads and everything that I've read that pertains to what I'm looking at doing says that port velocity is it. Valve size has been discussed and most agree that 1.880" intake and 1.600" exhaust valves are the way to go for those heads along with a good competition valve job and bowl clean up

300 hp is a very achievable goal, even with a stock untouched heads but probably need around 225-230 cam and mild cr bump, or to do it with a lot less cam need more cylinder head. My guess a 5.2l magnum with 4bbl and headers is probably only 15-25 hp shy of 300 hp. There's many ways, I'd go with the best head you can afford and or build within reason.