Info on 1937 21 Stud

Hi, I just purchased a 1937 21 stud motor and tranny from a pickup. I plan to use it in my 32 Project. Any info good or bad would be appreciated. I also have a 46 car motor/tranny, but the 37 seems to be in better shape, it turns over and has good compression, the 46 is stuck.
thanks ahead of time,
Ralph

21 stud flatties are not really good hot rod engines. Hop-up stuff is rare. Swap it to a restorer and find a good 24 stud, even a 255 Merc. They're out there, I have several good ones.