[aerotruk63]

I looked in the 1962 Chevrolet Master Parts Book.
Going out on a limb here I'm assuming you have a single speed wiper only.

GM Parts book says 4907734 60-61 is the same motor then it changes for a new number for single speed 62.

Hollander Interchange says 166. for single speed electric
Buick 59-61.
Buick Special 61
Chev. Pass. & Delivery. 59-61
Chev Truck 60-61 excluding forward control (which means P models)
Chev Truck 62-63 Tilt Cab
Corvair 60-61
GMC J & N series single speed model 1000 K1000,1500,K1500 & 2500
Olds 59-6Olds F85 61-62
Pontiac 59-61
Tempest 61

Check for proper grounding before getting another motor. Read that somewhere.