So I was doing some testing on Sunday ,tuning carb ,checking plugs running 100 shot and 150 shot of nitrous , so I tried leaving at 4700,4500 ,4000, 3500 and 3000 car does alot of spinning not much at 3000 tho ...... My question is should I start playing with rear trailing arm angles? Spring change, shock adjustment? Car has super T10 ,427 very mild , 9 in rear with adjustable lower mounts ,QA1 adjustable upper trailing arms, adjustable lower trailing arms, 13" tall 125 lb springs, QA1 adjustable shocks ....the front has iroc front coils, tubular upper A arms, adjustable shocks, no front sway bar. Tires are 28/10/15 M/T slicks and I use 27/10/15 American racer oval slicks . I've done alot of searching and seems like I got the parts but still missing something could use some veteran advise