Mine takes a full bucket load ( optional 6' bucket ) of 3/4" crushed rock and doesn't need the 4wd to do so. JD80 loader. Later loaders were I think, a model 440. There are sure places the 4wd helps out, but this isn't one of them so far. Sure can see the load on the front tires when the load is lifted, but think a 2wd should work out fine. just keep the front tires aired up. Normal bucket for this one is, I think, 54". If you have a problem finding one, look at Koyker, great aftermarket rig. Mine is a JD though. Other thing I have going on mine is a #8A backhoe on the back most of the time, that 900 lbs could be helping me with a counterweight for heavy loads.
Chris