I put in a dual pass rad from 4 seconds flat.
Had it setup like a 26 inch so it is a tight fit, but it works.
Had to move the horns to the outside.
Fits in my 65 coronet.
You could probably order one to fit in the 22 inch space. Doesn't have a cooler for the trans,and both inlet and outlet have to be on the same side.

here.
http://www.4secondsflat.com/Radiatorsmain.html