Originally Posted by the_new_kid

The Allison transmission that is behind the 4bt is a Allison 1000 the same that is behind the duramax with slightly different programming but the same none the less. The bell housing might be a different also i am not sure what bell housing the duramax has.

I plan on making at least 300hp to start but shooting for a final number of 400hp. With a common rail that should not be too hard just injectors a box or two and better turbo.