360 running on 4 cylinders

you can disable spark by putting little pins in the cap wire boots that extend out of the edge of the straight boot. They were little brass brads when supplied by Mallory in their 1985 Supershops $8.00 7mm blue cut to fit spark plug wire set. The you just take an insulated ground clip and touch the pin and it'll divert the spark right to ground killing that cylinder. Wrap the coil in a wet rag and see if it does anything. If the coil is going south, I think it gets hot itself.