1984 nissan 720 won't start after changing dist. cap and rotor

I have done this at least 100 times and I have never had this problem. I have a 1984 nissan 720 pickup with the z24 8 plug engine setup. I changed the distributor cap and rotor and now the truck won't start. It will turn over and I will hear a pop every few turns but it never fires. What could I have done? I didn't move the distributor at all during this process just removed cap and rotor and replaced with a new one.

Same problem here don't know what the hell is going on