Me: I need a fuel pump.
Parts Monkey: What are you working on?
Me: 1971 Datsun 510
PM: What motor?
Me: The only one they came with. 1.6L OHC
PM: We don’t have that.
Me: OK, try a 1977 Datsun 720 Pickup, 2L motor.
PM: Oh, I have one of those, but I’m sure it won’t work on your 510.
Me: yes, it will. Datsuns are like Legos.…