805 will couple up to the claws. I don't use the short couplers because the shank is different than the standard coupler and has a little less side to side pivot. With body mounted Kadees in 3R, you need all the side to side movement you can get. I just assemble the coupler and grind it down to the coupler shank and round off the corners.
You can also take a Dremel and cutoff wheel and cut off the tab on the truck block. Done that many times too.
