I have TCP coilover system and R&P in my 70 Mach1. TCP makes awesome products. I have the manual rack and am very happy with the steering feel. The turning radius is not quite as good as my previous flaming river quick ratio manual gearbox but it isn't a big problem. I had to change my 351w headers out to fit with the R&P. FPA 1 3/4" full length headers fit nicely with my rack. Alan