Yep, that is a Lynch Road car. Those fender tags a tough to decypher.
Your Vin:
WP29 - Charger Special Edition
G - 318 150 hp
3 - 1973
A - Lynch Road
115988 - was 15,988 car scheduled for production This would be the 15,988th VIN assigned. The VIN is administrative and virtually unrelated to production. Theoretically, VIN 100001 could go on the 100th car scheduled for production.
I can say on the tag E44 is a 318
D34 is not listed in the 73 book but is in the 74. It is most likely an 904 automatic. Starting in '72, the code D34 became used to signify automatic transmission on fender tags, broadcast sheets and window stickers. Use of the generic D34 code no longer tells us which automatic (D31 904 or D32 727) was used for that application as in previous years. You have to go to another source for that info.
JY3 is lower body color
V3X9 is upper - Black (is/was the car light gold with black interior and vinyl top?) V3X9 is the interior trim code. V1X tells us the car had a black vinyl top.
Scheduled Build Date 9/19. So it is either an early 73 or very late 73. Probably early, but late would explain the D34. As the production of model year cars began in late summer of the previous calendar year combined with this low of a VIN, we know the scheduled production date was September 19, 1972
Hope that helps.