If both carbs. flow exactly as advertised, 1050 CFM , I don't see any gain from going from a 4150 to a 4500 carb. unless one is not tuned as well as the other one confused
As far as the intake swap you may pick up some HP or torque or move the peak RPM around some shruggy scope up
Your wondering about making it better, the only way I know on how to find that out is to do it thumbs

Last edited by Cab_Burge; 02/18/17 04:40 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)