I worked as a Toyota Parts Interpreter for a number of years in the 90's and even then cars from the 70's presented challenges, consider this
- The dealer needs the reference material and it takes up valuable space (see image)
- The staff need to know how to use the older reference material. These days you just enter the VIN # and the EPC removes all but the correct parts. The EPC also handles supersessions.
- A lot of interpreting for older cars requires knowledge only gained from years of experience.
- It also takes a lot more time than interpreting mordern parts.
So, the dealer needs to have an "Old School" interpreter and give him / her the freedom to invest time in chasing old parts for a small return on that time.
Given that Z's disapeared out of showrooms 35 years ago and normally 7 years after that parts demand dries up. You would be looking for an interpreter with at least 30 years experience.
You are more likely to find all of the above in a country dealership.
So Yes, Trevor is a rare, valuable and unfortunately disappearing breed of Parts Guy
Cheers
PB