Car won't start, No spark

Also alternator could be a bad connections, Starter is also a connertion, Plus your key start could be bad with broken wire, Alternator I have to run extra ground wire to mine.I turned my 64 to electronic and the grounds to alternator stop me cold till I grounded it better. Where bracket goes to head or block may be painted or oily.Also any build up of sludge can be a quick ground and stop you cold it can be any where on the engine or firewall.