Starting Problem

[PANAVIA]

If no POP (trying to fire)--no E juice, or no Gas.

I would hit it with starter fluid and see if it pops. if it does then its fuel, if not then it is spark related.

someone trip a hidden kill switch and not tell anyone >?

V+ to the + coil (or V+ to the MSD box) during cranking AND run of the ign switch is key to POPing, and running.

--Steve

[undy]

Make sure you didn't cross any plug wires when you changed the plugs..

[Bryan Wilson]

I had the exact same problem, would run rough then backfire through carb and stop. After swearing the problem was the carb I brought a new one and the problem was still there. Eventually got a new ignition coil and problem solved.
Try a new coil.
Cheers,
Bryan