[quote]I have since had the cables rerouted and the exhaust adjusted ...... but the rubbing and hopping continues much to my dismay.<hr></blockquote>
You are going to have to determine what and where it is rubbing. A tunnel enlargemant is going to be expensive and unecessary in my opinion. Either rebushed, modified or aftermarket control arms will not allow as much pinion wrapup and the moving of the shaft closer to the tunnel. They will also maintain better pinion angle on acceleration/deacceleration.