Since the 12v conversion was done 15 years ago and likely worked without issue in the 500 miles prior to turn signal install, that's likely not the issue. Same with compression and timing.
Engine turns over, spark at points, ignition control side seems solid.
That leaves fuel and spark at the cylinder. If it doesn't 'catch' with starting fluid, then I wouldn't think it's fuel related (although that may be an issue later due to aging ethanol).
The single point of failure that makes this crank/no start make sense is the new coil. Is the coil wire firmly contacting the coil terminal? Can you swap to a 'known good' coil? Would it be possible to position a mirror or camera where you can see a spark (spark plug removed and connected back to plug wire, spark plug body grounded)? Even a super long plug wire would work for this spark test.
Last edited by Hink; 10/22/2020 9:36 PM.
