ive got a c pushing just under horse its a l stroked to stock tranny has been rebuilt but not upgraded stock rear end i just replaced u joints last week they are the originals lasted miles before they were seized and useless so i think unless you are going to go nuts on power the stock power transfer system is ample id still check the rear end out and rebuild it if need be new u joints seals on the diff and tranny potentially rebuild trannydiff if they are worn out but at the very least in my case the cars stock setup can handle horse