The measurements on the Cold Case radiators are substantially thicker than the CC374 or KKS374 radiators. I messaged Cold Case about that to get the actual core thickness. I don't know how bad it is for a mechanical fan with the short fan clutch, but I know the Cold Case radiators are an absolute "no-go" for the Contour electric fan set up.
I put a 22" cold case in my 70 duster and tried putting a mech fan/clutch in. Would not fit at all (hit the core). Pulled the rad and went 26" 3 core champion. Worked great with contour fans.