The other two-letter indicators on the body tag are for options. They're listed below.
I have no idea what numbers would be used for options except for the two I found online.

RA - Philco 8 tube Model 802 radio
AN - Concealed cowl manual, left side

RD - Refrigeration unit
KI - Kilometers (not miles) on the odometer
TR - Optional lighting (signals, e-brake, spotlight)
RA - Radio type/manufacturer
AN - Antenna type/location
HR - Heater
CL - Clock
LU - Luggage rack
TO - Convertible top

I'm by no means a Chrysler expert - but I'm a fair-to-middling researcher.