Safety factors
My '68 Cuda is NHRA spec'd for 7.50 sec (1/4 mile) and SS/AH rules dictate I run a (much modified ) stock K member with stock upper and lower control arms. The lower control arms are boxed. I run a stock manual steering box with moly tube & rod ends in place of the stock drag link. The front shocks are Comp. Eng. 90/10's for now.
I hope this helps clear things up.
sscuda