I have alot of friends that run them in mud trucks, you will need to cut i believe 5/8" off the shaft and fith a small cut off wheel notch the shaft/splines so it can fully ingage into the splider gear. Also the long side shaft will only go half way into the spider gear, but theres nothing you can do about that.
What are you planning on doing with the axle? I would DEFINETLY get all the shafts, gears, and carrier croyoed.