Can someone please date this A833?

According to this it goes in pretty easy with a fabbed shifter mount plate.
B/E body four-speed in an A-body
I found a Hurst plate on Ebay that mounts on the front 3 shifter bolt holes. It moves the shifter half way between the front 3 bolts holes for a B body and the rear 3 bolts holes for an E body. I have a bench seat in my Demon and the shifter fit just fine. I also found a offset tranny mount that just fits the tranny and the crossmember. I'll look for some pics I took before I installed it.