Take a small inline diesel pump ,(4~8psi) and prime it up until the return to tank line is dumping fuel. At that point spin it over at full throttle until the injector lines start spraying fuel. Tighten them and give the engine full acceleration via pump lever or pedal. Should pop off and run. I'm almost certain your idle will need to be adjusted. Engine will probably only run with the throttle actuated partially until adjusted properly. But I'm very happy to see you went with a mechanical pump. You'll like it.
