The transmission will not work as it is. You will need the input shaft, main shaft, rear bearing retainer/brake assembly, and sometimes the case for the F600. In Fords of that era, the engines were, 330 light duty ( mainly in U-Hauls ), 330 heavy duty, 361, 391, 477, 534. The pickups were 300, 361,391. The F600 has a 13" clutch, F350 10",11",12". Engines are not interchangeable between the two classes without a lot of modification. When I stood at a bench all day in a salvage yard, all I did was rebuild and repair transmissions and differentials. I used to make a pickup (F150, F250, F350 ) 435NP into one for a F500 or bigger in less than 15 minutes.