Sorry for the late answer, its time for dinner over here so its hard to keep it up.
Dont take this the wrong way now BUT we have givven alot of ansvers around the suspenion systems allready, look here
http://www.syty.net/forums/showthread.php?t=62285 Is it impossible to do this tread a "Stickie"??
This tread have been here long time
AXLES:
Front is still stock with a 3,42:1 gear and a Powertrax´s non slip system.
Rear is a 12 bolt Moser limited slip with 3,42:1 gear
CHASSIE:
Orginal frame car, with JSM front/Al Dustin Coil over system in rear
Rear axle have ladderbars in orginal leaf spring front eye location
And a panhard bar as locator.
Besides this its WERRY IMPORTENT to have the truck properly aligned, squared, checked for straight axles (some orginal toe in has to remain on rear axle) and have all the bushings steering arms in top conditions ,
U have to get the right spring rate acording to Ur trucks weight and U have to deside what chocks to use and settings depending on HP, stallconverter, tires, starting teknique, and a couple of more settings to Ur car, so giving all this specific info on Roberts truck wont help U a bit
One trick in all turbo engine cars is to controll power at all time specially if U have to start on almost cold tires.
Yes sometimes the rear wigles alithle on Roberts truck but thats more of a track prep isue not chassie setting