my is :
1 1/2 hp single phase 13.8 amp if wired 115 volt ( all you need to do is change a few wires in the box) 6.9 amp wired 230 volts ( that is the setup)

as for the motors you found .. you can a few thing's with them :
mounting:
1. get a 2x4 notch and mount it to the edge of you bench with straping
2. use straping to mount it to a stand ..
the shaft extenders and be purchased from caswell .. i have a dual shaft motor that is 3/4 hp one side got std and the other is a 6"

now caswell also sell's a split shaft that uou can run a v belt from the motor to the shaft and on that shaft i would run to = lenght exteders to balance it out ...
www.caswellplating.com
it is in the buffing section on the lower right hand side of your screen