Time to replace the coil to see if it is the cause of the miss.
The signal lights weren’t working properly. I took the opportunity to swap the old 1157 bulbs for LED units. Very bright indeed. I pulled and bench tested the flasher and it turned out to be the problem. A simple fix. It doesn’t ‘click’ very loud and it flashes quickly – likely because of the LED units. I’ll try to find a flasher that is louder.
In the meantime the horn needs attention. Starting with the horns themselves I tested them to make sure they were still working. They aren’t. Dead as a nit!
New coil from Carquest for about $45. Installed it and started the engine. I’m hearing valve lifter clicking – that should not be with hydraulic lifters. So I introduced a problem when I adjusted the valves. Engine still rough and maybe now because of an improperly adjusted valve lifters. I did manage to set the timing to its correct 6 degrees BTC. It is showing about 26 with the vacuum advance connected and 35 at about 1000 rpm which is a bit high. More checking on this later. Time to do the valves again – very carefully.