Interesting thread. Based on GG's "white book", mine is 1 of ~7 built. Sadly though, the prior owner opted to make so many mods during the "resto", that to return the car to factory original would NOT be cost effective (IMO).

JH27N0B - 383 4bbl
~ 84 - auto
~ 7 - 3-spd
~ 31 - 4-spd