A-999 Swap and Information

I tried to look up my trans on that list & it doesn't show either. It does have the 5 clutch drum,low gear set & the 1 wire for lock up but somebody cut the wire flush so it can't unlock the converter & also had it disconnected on the VB itself. My #'s are as follows PK 4446366 & it has the dished drum & pump. I took pics & would like some opinions on the hard parts condition in the pics. Thanks in advance for any info

The only thing that pops out to me is the groove on the splines on the rear clutch carrier. I have never seen a groove there but I also have never been into a 999 so it may be for clearanced for something. Those splines engage into the front clutch carrier clutch plates and the plates are much softer than that hardened spline so I think it'd be hard for them to do that. Just my thoughts. That did the clutch plate splines in the front carrier look like? The VB looks ok other than needing completely disassembled and cleaned.