Suspension setup?

So took my car (1977 Aspen 4 door) to the track last Friday night. It has a warm 408 I built over the winter. I had a few bugs I think I fixed now or so I'm hoping. Anyway I'm running a B Body 8.75 with B Body leaf springs. I put new poly bushings in when I had it apart. I'm also running parts store rear shocks with slapper bars. When I launched it was pretty viscious. Hoping you guys could give me some pointers setup wise.