I asked my dad about the bellhousing issue just to be sure. He said that they were out there but that they only came on the truck C4's that had the filler pipe treaded in the oil pan. He said that if you could find a bellhousing, you had to use a case that had no filler pipe hole in it. Sure would be neat to have. My opinion anyway. There is the same thing with the FMX. I have a bellhousing that could bolt a FMX to a 429/460.