Thanks for the follow up.
We started by draining the fuel tank with an electric pump. Refilled with fresh fuel.
Next we verified we have fuel in and out of the fuel filter.
We have fuel coming out the return line on top of the governor cover.
The shut off solenoid was stuck, got it freed up...
Helping my father in law with his 84 Chevy dully, 6.2. It’s been sitting a year or so with crappy fuel. Won’t start, no fuel at the injectors, we’ve done all the easy stuff, hoping to see if there’s other easy things to do before we decide to pull the injection pump.