I have a 1993 550sx with the the newer silver reed motor and stock rear exhaust on it. I just picked up a 1984 js550 that has some aftermarket things on it. I was wondering if I can take the stock pipe off of the 550sx and use the other pipe off of the 550, it is a Westcoast with Westcoast Manifold??? Also the pump on the 550 is set up for duel cooling can that be put on the sx model??? And the head on the 550 has been milled and has duel cooling, what about that switch??? Will these switch out alright, or will it not be worth switching???