West bend became Chrysler in 66 A brief check of the generic service manual 66,67 perhaps more indicates the early Chryslers are identical to the West Bend.
Standard prop diameter is 10 3/8 on all models, 35 to 55 hp.standard pitch 45,50,55 is 12 1/2 though that would depend on the application.
The Chrysler Crew may be able to help with a prop.You could check ebay as well.
