I'd think one could take some kind of 3/4" rasp bit and carefully open these up enough to fit 73 up.
Lots of material in there. View attachment 1715569014
It’s not just the diameter though. On the ‘73+ strut rods the shoulder that holds the bushings is further back, the later bushings were thicker than the earlier ones. The overall length of the strut rods was different, although the effective length is the same. The section that holds the bushings is longer on the ‘73+ strut rods.
