You have to be satisfied that you have fuel to the injectors, and the system is properly bled.
Injection pumps produce a very small amount of fuel/high pressure. Volume at the injectors can be deceiving.
Have you replaced the old fuel? Does it run with starting fluid?
Are you getting good cranking speed with the battery & starter? Low cranking speed can be a problem, especially if compression is down a bit due to the long period of inactivity. Tow-starting will improve this.