[Jack21]

Can't help much here. Using MSD6 box, MSD dist, Accel CD coil. But here's a diagnostic that might help.

Most of these ignition boxes have a wire that is used for a points type distributor. It is not used with a magnetic pulse, or other electronic ignition. If you disconnect the primary wires to the distributor, but leave the coil primary wires connected, you can test the box and coil.

Take the plug wire from the coil to distributor, and remove it from the distributor end. Connect a spark plug to this wire and ground the plug base to the engine block. Gently grip plug with vice grip. Do not hold plug wires, plug, or plug ground while doing this. You're testing 40,000 - 50,000 volts.

Take points wire from box, and with ignition on, tap this wire against a ground. If plug fires, box and coil are good. Check distributor for wiring or malfunction. If plug does not fire, substitute coil for known good coil. If plug now fires, original coil isn't working. If plug still doesn't fire, box or box wiring has problems.