That's right, I forgot about the different front hubs for the dually trucks. I was thinking of just the I-beams and spindles. The single-rear-wheel front hubs should swap over with no problem, though, since the spindles are the same.
Curt ---- 1953 Chevy 6400, 1957 Chevy 2dr Sedan --"Mediocrity is easy, the good things take time"