I know this is old, but damn I wonder if mine is one of those builds. I've got a December 1986 1500 SB stepper w/ the A833... How can I find out what plant it came out of? Also, I'm trying to source a good rebuild kit with syncros as well as a full rebuild kit for the shifter bushings... I think it's the 6553 stamped reverse lever. That's what it looks like after almost 300k miles, t least. Any advice would be appreciated.