did it run fine after engin was installed? and if so have you checked fo
spark at the end of the wires and what about fuel pressure was that checked ?  if it wont start DONT! keep on cranking & cranking an engin
for extended lengths of time. not only will it drain a battery and shorten the starters
life but doing so can "damage the piston rings from a lack of oil!" damage can occur
until that engine runs and builds up oil pressure. instead pop out the spark plugs
and pour in a few ounces of oil and re-check as mentioned

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johnin