Thanks from everyone so far....
OK... . so will the 3:54 pull just fine... The trailer im getting is 12,000 GVWR and Dry Hitch is 1600lb. So who knows... again im only towing 4 to 5 trips a year. But I defenitly want to Bomb IT! :D and I sure dont mind shifting hahah ( I say that now :rolleyes...