Is the distributor definitely seated correctly and engaged? I had a similar issue on my Series 2A - it turned out I had the wrong distributor base plate for my engine - there's a taller one and shorter one, so even though the distributor was bolted down, it wasn't actually engaging the drive gear below, and the engine wouldn't fire.
@@TheRetroSeries2a if its low on completion just chuck a little engine oil down the cylinders it brings the commpretion back up and if it dose start the heat ushany frees of the piston rings and brings the commpretion back