You want the one for 3/4t ford or 3/4-1t GM, 6 point, hacksaw off 4 of the points, leaving two opposite points, use a file to smooth down th stubs, or just file off 4 of them. Also, a good 4" grinder is around $40, with a million uses. The K-D hub wrench is about $20 online. A hacksaw blade will fit.

The easiest way to take it loose is two pin punches in the nut holes and a lever. Forget torque settings. Take it off, replace the rotor, tighten the snot out of it to settle the bearing, back it all the way off, tighten just past where the wobble disappears and it starts to get tight, and you're done.