I've installed the valve.. So far it appears to be working without any trouble.

It's installed before the lift pump. Fuel comes in from the fuel lines through the valve into the lift pump.

I've bled and bled and bled and I can't seem to evacuate all of the air from the small filter in line right before the lift pump. Other than installing bleeder valves all over the place is there an easy way to get the last bit of air out? It doesn't seem to be effecting the performance of the engine (at least not in a way noticable to the eye/ear).

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.