no i didnt need a different spring rate, i had a totally different suspension setup than what fbodies are used to seeing. the suspension actually planted the tires hard and the feedback would be the body raising up.

You need to change the springs man your whole front and rear lifted. You want a spring rate so the front lifts and the rear plants and maybe some other work so you get a better hookup. Its the not the RPM.

I launched her a lil too hard there. ill get a better launch sometime. but still, at 4,000 RPM, the street tires wouldve just melted away lol