Or 6x6.5 trophy truck ........he does have a 496!
If he needs a rockwell pattern, he's plum outta luck^^^ that is well known as there were 6 and 8 lug SF from GM. He has the 10.5" FF...supposedly (not the 9.5" SF). He needs 6 lug hubs, which are also available....the axle shafts should NOT be part of this conversation.
Also, how do you know what bolt circle he needs, it was never mentioned, maybe he needs 6lug Rockwell pattern. 😁