Right now i got a 65 289 c code with a few aftermarket stuff on it. edelbrock carburetor 600cfm, performer 289 manifold, tri y headers and patronix ignition and its a c4 automatic. Im looking at getting the performer plus cam and edelbrock performer heads. Does anyone run this and how much of a difference in low end to midrange torque does it make? More interested in low end than top end. Would this be a good setup?