I have a factory regular cab 1986 Mazda B2600 that I use as a driving/hunting and bit of a wheeling/trail rig. It does surprisingly well for an IFS pu. The hybrid I am planning right now will be an extended cab Mazda cab and frame, cummins 4bt engine, chevy tranny/tcase and toyota axles. I have a set of 1985 toy axles, Mazdas are a dime a dozen and good old chevy parts aren't hard to come by. The 4bt will be the hardest to find but I hope to pick up a bread van so I can pull the fuel and cooling system with the motor. I haven't decided on suspension, I will probably go with full size springs because of the heavy motor and flatbed with accessories and so on. This will be a highway, hunting and hound rig with wheeling capabilities (air lockers, 35's and what not). Won't happen over night but I'm collecting parts now. Thats my story and I'm sticking to it!