Bill, I'm not sure what you motors look like but here's what I did with my 46. I got a motor and wiper arm from JC Whitney. The motor is just small enough to fit in the hole where the original one was. I had to make a blank cover plate for it. It needs to be flat ie. no indents for the switch like the orig. cover plate. I think you can buy this block-out plate from some of the vendors. Then I drilled a hole in the plate for a push-pull switch, turned the switch on the motor in the on position and wired in the switch.
The only other thing I did was to take about 1/4" off the length of the shaft to make the wiper fit the windshield better. The whole thing was a pretty easy install.
Good Luck
George
