my ol 91 GTA used to hook up great... 1.68 (with 255/60/15 road stars) was only a 12.6 tuneport with 3.73(100% stock suspention BUT had the advantage of DA KID driving..lol)
... BTW what top rad hose are you using? If I were you I would get 90/10 struts and leave tork arm alone.