(ET) deck motor replacement

[<gmbauman windstream net>]

I am rebuilding a WH E 141 with 3 bad American Bosch motors.  I understand 
the AB motors were not very heavy duty and suffered from early repairs. I 
am thinking of converting a new WH deck and driving it with one electric 
motor.  What HP motor should I look for?  Were the GE deck motors around 1 
HP each?  Did GE ever have just one motor driving all three cutting 
blades? What size was it?

Your cooperative wisdom is greatly appreciated.