[Technick]

If you want that engine to make some real good H.P. with those heads, stay with the Performaer RPM intake, get the matching Performer RPM camshaft, put 1-5/8" long tube headers on it with a 2-1/2" dual exhaust with either a X or H pipe, and top it off with either a Edelbrock 750 Performer carb, or a vac secondary Holley 750 cfm or Street Demon 750 cfm carb. The World Product heads will take to the cam, manifold, exhaust and carb like there's no tomarrow. NO the 750 is NOT to big! It is all about getting as much air into the engine as possible. I could build the same engine and overfuel it with a 2 bbl carb. It is about jetting the 750 so that the air ging in is the right A/F ratio. If you dyno the engine with a 600 cfm carb and then re-dyno it with a properly set up 750 carb there WILL be about a 35-50 H.P. improvement! I have done this many times and it is amazing how well a 302 cid engine will take to the 750 cfm carb. Just ask Ron1, he has been there, done that.
If you are going to spend the money and time and effort on the heads, justify the expense by optimizing the heads and the rest of the package, you will be glad you did. Otherwise why put on the bigger heads, especially if you are going to choke them down with a Performer manifold and 600 cfm carb.