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Go to your local NAPA and ask for air brake tubing, I believe you'll need the 3/8 O.D. It is black with nylon lining and perfect for this. Also get the brass inserts and ferrules and reuse the fittings already on you truck.

Just check for fuel in the crankcase oil. When it happened to me after many years of good service, the leak amounted to about a quart/1,000 highway miles. Much less will show up on your analysis report. Micing the plunger probably won't tell the story, a scratch is hard to measure, but it is...

No rebuild kit available to my knowledge. Replace it with a good unit or by pass it as shown above. The unit without an FDC is a different early model IP and you can't just remove the FDC and install a cover plate in its place. The "stop block" and fuel delivery adj is different for that...

The plunger within the FDC is lapped to fit and micron size hard particles (rust) may score the surfaces and cause a leak of fuel, which will drain into the crankcase along with the lube oil from the IP. This is a problem when the rust from the half century old fuel tank gets by the filters. The...

Here you go.

Yes, you'll find this explained a few times in the old threads. Also, remember to turn down the fuel when doing so, or you'll have some very high EGTs and boost pressures (also explained in the old threads). The IP without the FDC is an early model and not a rebuilt one.

Guy, read Jake's post a few times, it says it all.

They are from an old MVM article. The reason for the looped tubing is to use what's available on the original set-up. See the images below for a bypass using pipe plugs instead. Also, note the necessity for changing the fuel delivery after the bypass.