[Gasoline Fumes]

4) You need +12v to the injection pump when the ignition is on. This turns the injection pump (and engine) on and off. There are two more wires going to the injection pump. One for fast idle and one for timing advance. They both get connected to a temperature switch. You might not need this in LA, but it will help with cold starts.

9) This is where you put fuel into the van. Most diesel nozzles are bigger.

10) You have a vacuum pump on your engine. I don't know if it's strong enough for the brakes. GM always used Hydroboost on the diesels.

12) The glow plugs are only used for about 10 seconds. Normally you'd turn the ignition on and a "glow plug" or "wait to start" light would come on. When that goes out, you can crank the engine. But the glow plug controllers tend to fail and are expensive to replace. When the controller died on my 6.2L, I used a button to replace it. So I had to push the button and count to 10 before starting. You still need a relay for the glow plugs. They will melt most switches.