EDIT -
OK so after doing a final inventory and tearing my K&N partially apart to find out exactly what I need, I've made some alterations to the list. I found out that the elbow I need is NOT actually V6 specific, it can be pulled from any 4.3, 5.0, or 5.7L Vortec GMT400. Also decided to buy what mounting hardware I can new, it's cheap enough anyway. At this point nothing I need is V6 specific. Here's a link to the parts diagram from earlier for reference.
https://www.wholesalegmpartsonline....odel=14486&modelYear=1997&ukey_category=19400
THE TWO PARTS I REALLY NEED:
1.)Airbox mounting bracket that goes between the bottom of the airbox and the top of the fender. ACDelco part number 15713032 (discontinued), part number 25 on the diagram. Can be pulled from any 4.3L, 5.0L, or 5.7L Vortec truck.
2.) Airbox to fender top fastener that holds the airbox to that bracket. ACDelco Part number 15713004 (discontinued) , part number 26 on the diagram. Can be pulled from any 4.3, 5.0 or 5.7L Vortec Truck.
In addition to these I'm looking for a lid for the filter box from a 4.3, 5.0 or 5.7L truck with the K47 RPO code, which is for the high capacity air cleaner system. It looks exactly like the air box lid in the parts diagram I linked earlier, that diagram is of a K47 system. An easy way to tell a K47 intake from the standard one is by the tube that goes from the filter box to the inlet hole in the fender, part number 29 on the diagram. On a K47 truck, it's pretty much a straight cylinder. On the standard system, it's got a big resonator box hanging off one side, like part number 30 in this diagram. (The diagram linked below is of a standard system, and also part of how I found out that I was mistaken about the elbow being V6 specific)
https://www.wholesalegmpartsonline....odel=14486&modelYear=1997&ukey_category=19400
The K47 box lid isn't super necessary as I already have one. Mine has a couple of small holes in it though so if I could find a mint condition one that would be awesome. Everything else I've got covered. I'm just going to buy an elbow off eBay and order the rest of what I need (that I didn't list in this post) from GM Parts Direct.