52 International with 350 TBI and 700R4

[garden spyder]

I have purchase a power steering pump from a swap meet and am having trouble finding a V belt pulley for it, does anyone have advice on finding the proper pulley for it? I can make the pump fit the motor, but can't seem to locate a pulley with a big enough bore to fit over the shaft. It appears to be a pump from a GM V8 but I don't know what year or brand.

[garden spyder]