I am running a 26" aluminum radiator out of a 83 Quantum 1.7L gasser. It actually measures closer to 28" wide and just fits in front of the fenders and between the headlights.
I had to remove the braces betwen the grill mount and the fenders, make custom brackets, and indent the driver's fender to make room for the lower hose.
Since I am ruining a 1.6na, I was able to angle the radiator back a little. With a turbo, I would have had to modify the hood just a little to make room for the filler cap.