I crack the banjo nut on the top of the spin on fuel filter
and pump the lift
pump until all air is out. Then I tighten the banjo nut.
I crack the fitting on the injector pump
comes out. Then tighten that one.
Then I crack one injector fitting and crank the engine. Fuel will "pump" out the fitting. Tighten the fiting and the engine will start to run. Maybe "poorly. crack the second fitting and do again. Repeat for more cylinders.
The lift pump has never built up any back pressure.