Body swap question.

I have a 1966 international harvester 1200a that I’m interested in swapping onto a different frame, weighing my options out but would love to put it on a 12v 5.9 cummins. Would this be a good swap or is there a different frame that would fit the 1966 body better, I know I will have to cut the frame. (I’d like to put it on a diesel at least.)

Sorry for the bad photo this is the only one I have at the moment.