Don't feel bad, I went through "almost" my whole ignition trying to figure out a random missfire while on a road trip out to MD, started with coil after a test showed slightly out of range, went to msd box: swapped back to HEI, swapped cap, rotor, and wires, checked grounds, messed with timing, and carb adjustments. Never dawned on me to check the plugs I had put in a week prior to the issue happening, sure enough, porcelin crack on #7.
Oh and one more, chasing another misfire, again cap, rotor, wires, checked the plugs, nothing worng with any. Look to the msd box,
The theft safety wire, had come un wound and was just barely
not touching a metal support under the dash, so every bump, or quick take off, contact would be made and the car would sputter, yup I really felt dumb on that one. :lol:
Nice progress on the bus though, you work very quickly. :shock: