The first set went back in the boat that day and I've got a coupe trips on them already. She is running great, hard to believe the motor is over 40 years old.
I added up the cost of the parts and I'm coming in around $17 an injector. The price of the heat shields and copper washers should stay pretty consistent but the nozzles are going to get harder to find. The last time the nozzle was in a production Volvo engine was in 1983, VW, Opel and Audi used them their diesel car engines from 78-81.

I put together 3 sets so I should be good for the rest of my days.