So to clarify what has happened, you had the engine rebuilt a couple of years ago, you turned it over monthly to keep it free, and you have had it running for a few minutes at a time with twice the oil capacity, and now it won't restart.

Is that correct?

No internal damage will happen with extra oil, so rule that out.

No coil or points wear will come from full 12V in the short time you have run it. The points receive full voltage every time the starter runs, it switches to lower voltage after the key is turned to run from start.

You could have a flat cam and lifters, pull the rocker covers and check for loose rockers. This comes from improper break-in.

Start over with the engine on TDC, #1 cylinder, compression stroke. Check the distributor rotor for proper location in relation to the plug wires. Check the plug wire routing to each plug. Change out the plugs to new ones if oil stained.

Replace the points if you have any concerns about them, same with the coil.

Charge the battery or replace it with known good condition one. This is probably the most important step to take. With out proper rotating speed, even good running engine sometimes have a hard time starting.

Change out the fuel if its over a couple months old. It may not be bad, but fresh fuel works better in this situation.

One more thing, the engine might sound different with less oil. What you maybe hearing is normal starter noisy. To be sure, check the starter bolts and alignment. Check the flywheel teeth for wear in the bottoms or on the crown of each tooth. Shim the starter if needed so the wear pattern is not bottoming out or on the edges.

Joe


1937 Chevrolet Inline-powered Streetrod