31 Roadster pickup cab swap to Truck cab

[Bullrat]

I'm getting a 31 Roadster pickup and would like to to swap it's cab for a Pickup cab due to my wanting to use it during New England's various weather conditions. (NOT during winter salting). While the Roadster Pickup may be cool, it''s also too open to the rain we could get here in Connecticut. I'll only do this if it doesn't end up destroying the Roadster.
Any help would be much appreciated.
Chet
Voluntown, Ct.