You will not have any need to change the fan motor. When these things spin up to high speed they move a disturbing amount of air.

With the hood closed on my 65 and the cooling fan on high I opened the driver's door and could feel air blowing out from under the car.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon