Hello chilindrin1
I suppose you have the armed engine, you must verify that it is in the right time: piston 1 in the PMS, the 6 will also be in that position, to know which one in work time checks the Valancines, those of cylinder 6 will be pressing the valves, if not you give a 360º round until this happens, otherwise you have to correct the position of the pine Gears, the injection pump if it has a brand and you must put it to coincide with that of zero degrees. If the pump does not turn like that, you have to return the engine about 10º before the PMS and with the open fuel advance the pump slowly to the precise point that the injection of the pump 1 starts, at that point your engine must start.
Luck.
Miguel