[Mr70]

That didn't come out right.Let me rephrase it.
That distributor # was originally intended for any 1969 Series 10-20-30 truck w/396cid.But based on your date of 1972,February 11th,it's seen as a later issued service replacement.

It was also a recommended OTC field service replacement for any 1964-67 Chevrolet vehicle w/283cid. AND 1967-68 larger Passenger series w/327cid. AND 1968 Chevelle/ChevyII w/283 & 327cid.,but NOT including the Spcl.Hi-Perf 327.
Hope that explains it better.