I have a 1952 John Deere A that will only fire on the No.1 cylinder. I have overhauled the motor recently completely. It has a new electronic ignition built by Denny"s Carb Shop. I did continuity checks on the new wires and distributor cap and all are good. I hooked up my timing light and show No.2 firing through the wire but not in the cylinder. If I disconnect No.1 wire the tractor will shutoff indicating it is only running on No.1if I take the spark plug out of No.2 hole that"s not firing and put it in No.1 it will then fire and take the plug from no.1 that was firing good and stick it in No.2 it will not fire. I believe there is good compression in both cylinders as it is all new and is bored .045 over. I doubled checked valve clearance as we"ll and found nothing wrong. Is there a possible timing issue internal? Thanks for any information.