I am working on building a 31 2 door sedan rat rod. I am going to use a 4in dropped front axle with a 6 degree notch just in front of the firewall, and on the back I am wanting to Z the frame 10 to 12 in. How many inches from the back cross member do I cut the frame and how many inches should I lengthen it while it is cut. I am planing on using a 350 for power.
Thanks for the help.