Well i'm sure that the rwd mt75 box came fitted to a v6 24v engine....it must have come in some variant.

tbh the options for rwd are rwd mt75 or T5 (with adapter brkt...topboss do them IIRC)

I've only ever done the conversion on 4x4 sierras which is a piece of piss. Ford did a 4x4 granda and a rwd granada 24v I'm sure of it....i'll go check as its bugging me now.

Dan