I have a 1991 Dodge W250 with a 5. 9 gas engine that's getting a little tired has anyone put a 6bt in one I'm trying to find out how big a job it will be. I was told that the automatic transmissions are the same is this true? It has a 727 trans in it. And what about motor mounts, vaccum for power brakes, and other acceseries like cruise contol and A/C ? Has anyone out there tried this?