Looks like your off to a good start. Those trucks are bullet proof. I had a 92 3/4ton 2wd with a 350 and a in 95 had a 95 3/4ton 2wd with a 454. Other than exhaust manifolds on the Big Block (7 of them), I had no re-occuring issues with either truck. Regarding the amp ground, why not just run a ground wire back from the battery to the amp? That should solve it. Love the back bumper & rear firing exhaust on it BTW!