Vapor Lock

[rons49]

I know I am bucking a lot of smarter fellows here, but 1. you restored the Tilly. Tillotsons have a nasty reputation of warpage of the white metal body that will cause issues of fuel mixture. 2. re check the float level. You may have a leak down of fuel into the carb while sitting. That will cause a rich mix upon restart( short time). It might be possible to crank the engine with the throttle wide open to restart. But, I would swap another carb that is known to run well. See what happens.