I have been thinking of different ideas to make my truck stand out and i think that a c' in there will do it. I talked to the local Cummins dealership and they said that it might be possible to change the flywheel housing from one to the other, does anybody know for sure? I am just trying to do some homework on this since I am still well under warranty. The reason that I say that it is possible is that some farm tractors use both motors in the same frame so the b series flywheel housing could conceivably be installed on a C series and allow us to use our current trannies. People have squeezed more out of their b' than the stock c' so the transmission could conceivably hold up for a while? Or am I out of my mind?