Comp. shocks 3 way ???

[77 ford]

i have a set of Comp eng shocks (rear) and need to know what the stiffest setting is, they are 70/30, 60/40, 50/50......i have them set at 50/50 and when i launch the car my tires rub on the lips just a little and they are rolled, i need to stiffen it up a tad, what would be the best setting ? oh its a leaf spring car, Thanks in advance guys

[2001-WS6]

I think the 50/50 setting on the C-E rears is actually the stiffest if I remember correctly. I think we are running ThunderStang at 40/60 right now.

Rick