Yes, a L shaped bracket drilled for the 4 holes on the A/C bracket and then drill 4 holes on the vertical side to match the York and bolt it down. Then just have to figure out a tensioner bracket for a pulley to keep the belt tight.
I built a hinged one on my old CJ where the York itself moved to get the tension. I don't have any pictures of it unfortunately. Then the alternator pulley is all you have to buy. Well and then all the parts for the air system.
Sounds like a plan..
But this would only work on the 97' without AC right? I wouldn't be able to take that AC bracket and put it on my 02' with AC, since the alternator is in a different place