Hi! I got some questions for you guys. I found a 1957 230 flathead 6 to put in my dodge kingsway -51 that got original engine and transmission . The new one got a 2 speed power flite but i want to stay with my 3 on the tree. Will my old gearbox fitt bolton to this newer engine ? And its 12v but i run 6v and want to stay with that. Can i just move the stuff from the old engine to the newer one?