Some codes could be other things, but this is most likely, does it jive with the car?

b5 rear arm rest ash tray
d7 rear heater
p6 LH remote mirror
u1 sold car

AB81 440 4bbl 350 horse single exh
C5 Torqueflight
G1 26" radiator yoke
J5 rear dome lamp
K8 power windows
L9 spare tire cover
R4 AM radio search tune
S1 A/C
Z8 buffed paint

407 scheduled build date
15000 sequential number
M9L interior = medium grade bench cloth and vinyl tan color
331 paint = Dove gray roof and body