I don't use radials (MT 29.5./11.5), but I do use SS springs only. NO Caltracts, NO pinion snubber, no anything. I did add an extra main leaf to the right side spring. .030 over, stock stroke 440, very close to 600 hp, 727, Turbo Action "J" converter, Dana 4:56 gear, car w/ driver 3288 lbs. Foot brake (not no box), 60' 1.38 -1.40, ET 10.30's- 10.40's, 126 mph. Not too bad.

Brian