I would pull the plugs and see if they are wet. Squirt a couple shots of oil in each hole. Verify timing on TCD and the rotor pointing at number 1. Make sure the oil is not diluted with gas. Either clean or replace the plugs. And see what it does. Could be the rings are washed .
Anytime you have been trying to start an engine this long you have washed down the cylinders, Do what NITROUSN said and squirt oil in the cylinder. Don't be shy, squirt a bunch in there. Then try again. And don't worry about it fouling the plugs, it will go.
