Put some pinion angle in the rear. I had mine down on my old Duster about 5 degrees( with S/S springs) and the thing hooked on ice. Made a huge, huge difference just adding that shim.
What in the world does pinion angle have to do with making the car hook?
Absolutely nothing........Some old timers would say pinion angle helps it "throw" the pinion more at the hit. None of it's true
