Ok, I 'm swapping a SC10-III into my sled(00 MXZ700) in place of the II in there now, and that looks like a bolt in deal, as far as I can tell. I'm putting the II out of mine into the wifes99 440 MXZ Fan. It has an SC10. One problem I see, is the back bolts for the cross shaft, are above(just above) the running boards on hers, but on , say a 670 HO s series, there are in a bracket just below, say the same as mine is now. So do you HAVE to add the brackets? and drop it(and I guess would raise the sled too) , or can I use the existing holes? Looks like maybe the wheels on that back crossshaft are smaller on the straight SC10 too, may have to use those instead of the ones on the II. I'm putting this in hers strictly for better stutter bump ride than anything else, so no huge jumping involved , if that effects where the back shaft is located.I hate to start drilling/modifying the tunnel, as I can't think this would help the resale value any.Any info or pics would be app. I'm sure I can figure this out, but I just thought if someone has done this, I could save some time and hassle. Thanks!