As you most likely know:
- adapt the front motor mount
- use your 1952 clutch housing
- use flywheel and clutch assembly that meets your needs (6v or 12v).
- instead of using "pusher fan" consider buying a water-pump adapter plate and use you old/1952 water pump.
http://chev235guy.blogspot.com/search/label/Water%20Pump%20Relocation%20Adapter

Will you have a 6v or 12v electrical system?