I have 94 gmc 6.5l 2wd that i had wrecked and was wondering what u would have to do to mount the tranny on a 93 gmc 6.5 l 4wd? can you just change the tail houseing or would you have to rebuild it and change the output shaft. if thats the case i should just find me a 4wd tranny or get a rebuilt one. Thanks for the help in advance.