86 to a 87 engine swap need help no spark

i have a 1986 nissan z24,720 i swaped it for a 1987 z24 engine every thing was going well i only had to change the motor mounts from the old engine ,the vac rail ,and my intake and carb off old engine i used the distrubator from my old engine because the new engines distrubator didnt have the vac advance like my old motor i also had to swap my oil pump i tryed to start it and it fired up real quick i didnt have everything hooked up so i turned it off i then put all vac lines ect went to start up again and no spark im going nuts trying to get it going can anyone help me out please

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