Oh, maybe that explains things.
The rims have 6 clips.
16x4.5

Owners manual says 16" wheels were on trucks with 8 leaf rear springs. Mine has 7 I think, but who knows if they are original as well. So maybe this isn't the original wheel after all.

I'm also wondering why the original owners manual says the tires are tubeless, but I can't find tubeless tires anywhere.

Maybe these are NOT the wheels I really wanted after all.

When God gives any man wealth and possessions, and enables him to enjoy them, to accept his lot and be happy in his work�this is a gift of God. He seldom reflects on the days of his life, because God keeps him occupied with gladness of heart. Ecclesiastes 5:19-20