I'm trying to find the cause of a misfire on my 60 3A and was wondering if I'm on the right track. I hooked up my timing light to each plug wire and found that the light flashed normally on cylinders 2,3&4, but flashed inconsistently on #1. Is this a good indication that the misfire is probably in the #1 cylinder?? and if so, is there anything else but a faulty spark plug, wire, or distributor cap that could possibly cause it. TIA