"23" is part of your VIN# WS23 - 2 door hardtop
"D6XW" is your interior code - deluxe vinyl bucket seat interior "WHITE seats w/black dash & carpet"

Y codes are to the right of the VIN# on the top line of the b'cast sheet.
What is your Vehicle Order Number? Above the VIN sequence on the fender tag. 6 digits begins with "G"?