From OW and up and X and XZ gears sets are the same and both that the larger input shaft.

Bet it broke the floor out myself, had it happen several times before on my blown cat, put a diff prop on and run it in reverse it will lass longer the rt hand rotation drive seems to pop the floor on the upper gear never broke one on a lh rotation drive,

Keep spare parts around, thats the way to keep from having long breakdown periods. Also learn to do the work yourself will save you lots of money, good luck.

I plan on doing the work myself. At this point it seems like it would be best to go with the newer style gears and go from there. Is there any place that's cheaper than the other to get the gears etc... that I'm going to need?

Thanks for the help guys, the responses have been more valuable than you know!

Mr. Gadets is the man listen to what he has to say and follow his advice!!

John,
I was referring to the X gears that are supplied in the upgrade kits. They all have the smaller input shaft sized pinion gear. The B1 X drive, OW and up would actually be using the old XZ gears.
But you are correct, I just refer to the new style thick floor'd gears as X gears. But time flies, I guess they aren't very new anymore.

tylogan11, thanks! I try.. :)