u might want to check the power valve after u get it running.i had to redue mine on my old setup when i was going from race gas to pump gas and playing with the timing to get it right and mine back fired threw the carb and took mine out.is your distr. holder on tight i've seen them be on lose and seen them jump and reseat them selfs down on the wrong timing point.does it just turn over like its nothing or is it hard to turn over?