Wheelies - Hypothetical Combo

DIA Rate Part Number fits
0.81 90#/in P5249148 drag bars
0.83 100#/in 2535888-9 slant six bars
0.85 110#/in 2535890-1 slant six w/air - 318 w/o air
0.87 120#/in P5249149 (2535892-3) 318 w/ air - 340 std bars
0.89 130#/in P5249150 383 std bars
0.92 150#/in p5249151 *h/d handling
0.99 200#/in p5249152 solo/road race
1.04 250#/in p5249153 h/d solo road race-oval track
1.09 300#/in *p5249154 oval track 1/4 mi--optional 1/2 mi
1.14 300#/in p5249155 oval track 1/4 and 1/2 mile *

Drag car, run the /6 bars in it would be my suggestion.
Think about spring rate like this. If you have a valve spring and a spring from a Bic pen. Compress the valve spring with 20# (barely budge it) of weight and knock off the weight, see how spring react. Then do the same with your fingers (nowhere close to 20#) with the bic spring (fully compressed). That bic spring is going to FLY. The stored energy in the bic spring can release. The bigger spring needs much more weight on it to have a response.

Fast rise rate is good. Too fast is BAD... Many cars need the front end rise slowed to keep from unloading the rear suspension. The rise should be controlled and not a sudden jerk to a stop, jerky is bad unless you have a bunch of HP and tire to overcome it.