Mine uses A-body length springs but in a B-body.
I use the lower hole for the bars and no preload but just touching the top of the spring.
On the shocks, I use the Rancho/Calvert 9 position shock set on 7 to control extension. Before, with regular shocks it would porpoise badly.
On the front I use 90/10 CE shocks and removed the upper control arm bumper for more extension.
I installed the same exact parts in my 71 Demon, all supplied by Calvert. A-body mono leaves, Rancho 9 ways (set on 5) 90/10 CE's up front, Dana 60 w 3.73 gears, frame connectors, stock front suspension minus the sway bar. Switched from MT Drag Radials to 26x10.5 MT ET Street R bias ply tires (4 speed car, likes the bias plys). It hooks like a beast on the street.
