The distinction between narrow-field and wide-field Ives motors applies only to electrics: the 1134 steamer had a completely different motor, built into the locomotive frame.
Although the Ives steam loco had an entirely different motor from the electrics, it took the same wheel as the wide-field electrics; with square lug on all 4 wheels. This applies to the 1927 green cast iron 1134 as well as the 1928, 1929 and 1930 versions of the die-cast 1134. Same wheel as the wide motor electric, all 4 with square lug.
The earlier 1132 steam loco had cast iron wheels.
The narrow-field electric took a wheel with a longer hub, but with the same square lug on the inside of that hub. All 4 wheels have the square lug.
Don't go by MTH. They redesigned the Ives motor to be able to use parts from their Lionel build-a-loco. The MTH Ives motor has longer brass bushings in the motor side plates, so they had to lose the square lug on one side.
The RichArt reproduction Ives motor is identical to the original wide-motor, it takes all 4 wheels with the square lug.
The only case that I could find of the square lug being taken off the wheel was on MTH.
I think you only need to make 3 wheels:
The electric narrow-motor with the wider hubs and square lug on all 4 wheels.
The electric wide-motor without the long hub, and with square lug on all 4 wheels.
The steam version which is the same as the wide-motor electric but with the different casting for the steam side-rods.
Eric, the one case you have of the square lug being taken off, can you determine the manufacturer of the wheels? Are these maybe MTH replacement wheels?
david