Its been a crazy week, didnt have time to respond to all the responses. So pretty much a 700R4 is out.... using a dodge trans from a later model truck is a possibility but I have alot of money in the adapter plate, flexplate , starter for a gm automatic. The 4l80e is an option but i dont feel comfortable dealing with the wires and such. I got a quote for 800 bucks to build the 400 strong for the cummins. I am still gonna try to get the truck back soon so my mech can check it out. My mech still believes the guy did something wrong with the position of the Torque Converter.