The thing thatīs hard to believe is that there inīs any photos of this bodybuilding contest
He may very well have won this contest but no pictures thatīs strange, oohhh I forgot NABBA is a ninja organisation thatīs why the pictures have disappeared 
One of the most common emails I get at musclememory is "I/my father/uncle/etc was in the 19xx Mr ____. Do you know where I can find photos from that contest?"
I'm sure Jack has a photo from that contest somewhere in his closet, but how long would it take for you to find a photo from a specific day ten years ago?
But all of this is stupid, because no one is claiming that the NABBA North American was a major event. Jack was not among the best amatuer bodybuilders of the time. The big boys did not compete in NABBA events. But so what? PDI can give "pro cards" to who ever they want. So can the IFBB.
The IFBB is now giving pro cards to the winner of the Team Universe and the IFBB North Americans. Does anyone here believe that the competition in these events are in the same league as the NPC Nationals or the NPC USA? Michael Lockett won a pro card at this year's TU. Last year he couldn't even place in the top 15 in the Nationals.