Hy LONG NOSE 37, The 630 stuff will fit, will be about one foot longer, the cabs are the same up to the 600 series, I believe in the 700 series and larger they use a larger cab, reffered to as "the fat boy cab" the doors on these cabs do not roll under at the bottom, as the pickup cabs do, that is how I tell what I'm looking at when I'm looking at stuff in a wrecking yard, hope that helps.
