okay I took my back seat out of my road runner and found my build sheet which is really cool but i also found another build sheet that dont belong to my car but i think it belongs to a higher class road runner or gtx satellite does anyone know if one of the cars has R P as the first two letters of the vin from what i can make out of the first two letters i can get the rest of the vin (R P) 23 M 2 G 186291

 

well zach im thinking off hand and if my memory serves me right RM is a roadrunner RS is a GTX im wanting to say RP is a satelite espeacialy with the G for motor size 318

 

Zach this is what i come up with for you
its all i can find with what you gave us

Body Type: R = Plymouth Belvedere/Satellite
Price Class: P = Premium
Body Type: 23 = 2 Door Hardtop
Engine: M = 400 190HP(net) 1-2BBL 8 CYL
Year: 2 = 1972
Sequence Number: 186291 = 86291st Vehical Built