So as I dig into this the grab rail is an option and would have to be ordered by the dealer as stated on the oct 65 price list
the two choices were a full cockpit grab rail in alum or SS. list/dealer net price of 60/45 for alum or 80/60 for SS the rail was made standard sometime after this when unsure.
so any 16 65 or earlier would need to be ordered with the rail.