[whirnot]

The longer pitman should give you a shorter turning radius. The box only turns so many turns, end to end, the longer the pitman, the more the steering moves. Some did not like the shortened pitman due to a longer radius.
I also would try the standard first. I talked to one guy that used the f100 box and ended up going back to the longer pitman. It was too squirrelly. He is happy now.