The lower 3 hole ring is just where the three bolt holes on the pump are. It looks like the larger one utilitizes 2/3 bolt holes on the stock i6 circular bracket (both on a ranger I guess) I frankly think this would make the most sense to convert. The tc pump is a lot smaller than the p pump the vans came with. It also has a bearing on the shaft instead of a bushing so hopefully missing a bolt on the bracket wouldn’t be a huge deal. Unless I’m missing something about how it can’t work lol