I think you're thinking of the powerstroke with heui injection. The idi's used a db4 injection pump similiar to the db2 that the 6.2/6.5 used(turns the opposite direction, and is a 4 piston instead of 2, capable of alot more fuel). My uncle still has a 92, and at 1 time I knew quite a few people with them. I know glow plugs and the glow plug system is fairly problematic. It uses 6 volt glow plugs and a big resistor to drop the voltage down. When a glow plug goes out, it increases the voltage to the other plugs, and also leads to extended glow times since it doesn't have as much load on the timer circuit leading to exploded glow plug tips. You can swap in a set of 60g glow plugs and go with a solenoid and manually activate them, or add in a timer to run them(or you could probably use a 92-93 6.5l glow plug relay setup). I know the stanadyne injectors are a long skinny design, and seemed to give alot more trouble than GM's did at higher miles, but if you change them out when you're supposed to, they're fine. Most everybody I know with them had starter troubles. So the powermaster should take care of that. The only real complaint my uncle had with his 92 was stock it didn't have a turbo. At 5K ft of elevation he said it became gutless and you just drove it by the amount of smoke coming out the tail pipe. He added in a banks turbo and took care of that. I do know if the starter doesn't kick it over fast enough, forget getting one to start. My neighbor had to use a rag soaked in gas if he let his sit parked for more than a week.
As to the brakes, I think a good hydro-boost setup would take care of alot of the problems. They used a pretty small vacuum pump that doesn't turn that fast, and there was no reservoir for it. You get one decent application, then you gotta wait awhile for vacuum to rebuild. Dodge had the same problem up to around 96-97 when they finally started going to hydro-boost systems, then there brakes got ALOT better.
