The drive train should be the same, quickest way is to pull up an online parts list, just google it, then compare the part numbers for each, I'm sure it will work, I was looking into reverse for my 96 XCR aggressive chassis, the XLT wedge touring revers chain case was the same part number for the base, the difference is the outer case, more room for the extra gears and shift linkage, but it all bolts up. I'm assuming yours will as well, but check the part numbers first.
2000 Indy 500 XC, Fox shocks up front, M10 trail in back. '99 440 XCR for my son. 96 XCR 600 SP tripple pipe, 862 miles on it !! (until it snows....then look out, odometer !!)