Hmm...interesting idea.
I have been looking for something that would swap without too much hassle, but the only option I see so far is to buy a tensioner for a '92+ and mod it to bolt on. Depending on the brand, it doesn't look like it would be horrible to drill out the stud so I could bolt it on to the existing bracket, but I think I would have to move the locating pin as well. Or hope the bolt would be enough to keep it from turning and eyeball it.
My original plan was to dump the air pump and bolt the bracket and tensioner from the later motors on. But that was partly based on the erroneous idea that the tensioners worked in opposite directions. It appears to be now they spin the same way, but mount in different orientations.
