Jimmy-
you can buy a compression gauge for $200 and do the test yourself. It takes less than an hour to do all 5 cylinders from start to finish. Anything less than 215 I believe and you 've got a problem. I did a quick test on my '80 wagon and all cylinders hit 240, which people say is low, but the car runs great and produces very little smoke at start up, and next to none when warm. It was my first time testing a small automotive diesel, so the results my be on the low side due to my borrowed guage and testing methods. My injectors didn't look as bad as your bad three, but I went and pulled 4 from a 240D which looked better and the engine runs fine. I replaced the three worst looking ones. I reused the seals without a problem. I would think you need to do at least clean up your injectors (try a brass brush and solvent soak followed by a good airing out) by yourself and then it that doesn't work get them pop tested and cleaned by a pro or replaced. I can pull what looks like good injectors if you want- but give me a bit of time as Frances is putting everything on hold here for a bit. Get that stuff straight and then start looking at other causes as why your wagon is sick.
William