Cal trac /mono leaf results

Gotta throw my 2 cents in here. I have found a lot of A body guys are in the same boat as bajavan and mcduff356. You buy the Calvert system, put it on, go racing and it don't work like you hoped. Car is probably hopping or porposing. Hits the tire too hard, then unloads the rear. Car probably works OK on a well prepped track, but not so well on a marginal track or less.
This is because the Caltrac system doesn't do anything to the instant center. In an Abody (or any leafspring car for that matter ) the instant center is the spring eye. The 20" front spring segment is the shortest out there, whick puts the IC too far back and too high. If the car's rear ride height is raised it aggravates the problem. Conversely lowering the car helps. The real solution is to run GM 25" length springs. This probably means moving the springs in to the frame rail and forward locating the spring boxes. This becomes a whole lotta fab work for a "bolt in" suspension setup. The other thing about Caltracs is that the guys that have them working good will tell you to run double adjustable shocks on all 4 corners. Those shocks are phuckin crazy expensive.
So once you've bought your Caltrac setup, your DA shocks, and moved your springs inboard you got an expensive suspension that almost works as good as a ladderbar. This really begs the question, why run leaf springs if you don't have to ?

Here are some good reads.
http://www.baselinesuspensions.com/info/Launching_A_Drag_Car.htm

http://www.yellowbullet.com/forum/showthread.php?t=288916