Non starting issue

[Garlicbread]

Before I did the Bosch conversion at cold start the engine would seemingly run on 3 cylinders for a couple seconds then run fine, it was a bugger to start. The same seems to be going on after I changed the pump but it just doesn't start, the primer goes hard and fuel goes to the pump but it only dribbles out the fuel lines connected to the pump and nothing to the injectors when cranking. This is what happened to the Lucas pump before, I think that it's just strange that both pump are seemingly knackered and untampered pumps don't normally go wrong, not really sure what to check next, going to blow out the lines with an air line and see if that helps but not sure what else to do, any help would be good!