I only have a photocopy of the Mk3 RPS and the begining of each column is missing, so I'm unable to identify the part index numbers of the instruments and transmitters.
I have some numbers that perhaps someone can clue me in: The first few are International Harvester Corp numbers.
IHC-143241R91 DSN 6620-66-011-5753 something temperature.
IHC-186463R91 DSN 6685-66-011-5741 something mperature, electrical resistance
In the Mk4 RPS I have found
VDO Aust-CAS375 DSN 6685-66-025-0190 Transmitter, Temperature, Electrical Resistance
Would it be safe to assume IHC-186463R91 is the Transmitter, Temperature, Electrical Resistance?
Or
Would it be better to use the VDO transmitter for the different guage on the Mk4?