Same here, Luckily I found a short shaft fan, can't remember from where, as I understand that the fan should be 3/4 inch from radiator for maximum effect..
I drove my 70 Dart from Reno to Fl.
Everywhere we stopped someone had a Dart story (mostly older folks) IIRC, 70-72 darts total production was
close to a million cars. So they're still some left !