Hello, i'm swapping out my 6cyl for a 428 and would like to know what I need? Do I need to do anything with the steering? What about the springs, the car is a sprint and I read they are already heavy duty. Will I need different mounts for a bigger readiator or will the one's I have work? I also bought a M20 4spd from a 73 firebird with a 26 spline, will an 11in clutch to fit a 68 400 be what I need or what size? Thanks for any advice you can give, I want to drive her this summer.