Update... so I'm not getting squat out of the injection pump now.

I had the stop lever tied off for several days. Could something internal to the pump be stuck in the stop position?

With the lines off the pump and cranking.. just a slight trickle out of the fittings on the pump.

For giggles, I pinched the return and cranked the engine. Within a few rotations, it build enough pressure to blow the return cap off of the #5 injector. I'd say the lift pump is producing decent enough pressure.

I pulled the #1 delivery valve. It was pretty nasty. Even with the delivery valve completely removed (not the holder, just the valve and spring)... just a trickle from the pump.

Soo... I'm at a loss. Ideas?

The injectors were pop tested and installed. Cracked the lines and cranked and cranked... nothing. No pressure from the feed lines... just a slow trickle.