Think in terms (Of direction of travel) for both front wheels
Driver side tightens to the left,
Passenger side tightens to the right.
They were designed that way to prevent them spinning off.
WWWHHHEEeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee! good by wheel!!
The allen clamp nut is always a 6 melimeter.
You will not be able to drill front 4 lug drums, because of how they are made.
But 4 lug rotors are a yes if you weld up the holes with nickel wire and have the right guide spool to center up the rim on the rotor when you drill for studs. I have done that.
Now for the rear? The wider 2 peace type 3 drums and hubs will do it too..
I have Gm wheels on my buggy and it worked perfect..