I was going to swap a 250 chevy in place of my 216 engine in my 41 1/2 ton. My questions are. I want to put a 350/400 aotomatic behind the 250. Will any 350/400 tranny work? Will the regular 350 bellhousing work with the 6 cylinder starter? Will a 350 flex plate flywill work on the 250?Anyone know of a good newer type stearing box that I can swap into the pickup? thanks