70 dart suspension setup drag racing

Ive got a few questions on shock & caltrac setup on a sbm 420hp 1970 dart. It has mono leaf & qa1 adjustable shocks with caltracs in back, qa1 adjustable shocks in front. always ran footbrake and it felt like the whole car would just jump up when leaving off line. This year we put a powerglide trans and are leaving off a brake after adding a 9" rear. What setup should I start with on the shocks and caltracs this weekend?! Any help appreciated, Thanks!!