Nailhead in Model A Radiator question

Hello all, mocking up my front end on my channeled Model
A. Engine will be a 401 Nailhead. Looking for radiator advice. If I put the 32 shell to line up with the cowl and locate the radiator over the front axle I only have about 21" from the front crossmember to the highest or center point of the radiator shell. A little concerned that this may be too small of a radiator. Anyone with a Nailhead in an early Ford would like to get your opinion. Thanks!!

 

I have a small radiator on my 364', runs great.
I'm always at about 190temp. I'm sure if opened up to something bigger i'd get a little cooler but its fine-

 

Thats' good to hear. I guess it is what it is as there is not much that can be done to make more room. Did you have your radiator custom made? Is it aluminum or brass copper?