i have an 85 silverado 4x4 305ci, not sure what the stock tranny is! but i have a turbo 350/w b&m shift kit from my 62 impala ssw/327ci!so what do i have to do for this conversion? will the bellhousing have to be changed? will ihave to get a longer driveshaft? if so will the one from the impala fit? how does that hook up to the transfer case? what else might i need?