I am using the studs instead of bolts, to mount the 1//4 x 4 in flat bar on top of the forks on a walkie stacker rated at 1500 lbs, to extend them 4 inches, in order to lift a 700 lb ATV onto pallet racks that are 48 inches high.

The forks now reach all but about 3 inches across the bottom frame of the ATV and lift it alright but I want it to go all of the way across the frame.
The extended 4 inches just makes me feel better about it.

A material handling company suggested that it should be OK, since I'm lifting less than 1/2 of the load limit and I'm keeping the load close to the mast.