[Chuck Moreland]

Not with the factory bolts.

Try a socket head cap screw (aka allen head). The smaller diameter of the head may do the trick. Some creative use with a grinder can be used to bevel one side of the head to get a little extra room.

This is interesting because my 73.5 had the bolts in the favored direction, and the required dimples on the torsion tube. I thought this was in all 73s. It must have been phased in mid year.