Yeah, identifying the year is going to be a challenge. The car was a column shift, but I scored a nice 7 liter interior and converted to console and floor shift. The tag on the trans is missing, the pump casting is C6AP, but I believe all the pumps are the same. The case casting is D3TP. This is not going to be fun identifying.
I spun the input shaft, sounds like some squeaking going on, but the trans is drained. I pulled the shaft and put it in the converter, it spins, but sounds like a bunch of gravel and ball bearings spinning inside--it don't sound good.
I GREATLY appreciate all the thoughts and expertise (and time) shared. Thank you.