she won't turn over....

[wahlie]

Gents,
Recently replaced the alternator, plugs, wires, distributor cap, coil on my 67.... went to go crank her up. she cranks but won't turn over. the one time she did turn over she was shaking side to side real bad... Now, I made sure that I labeled the wires properly before putting new ones on.... I also know that there are a lot of variables but wasn't sure if someone could pinpoint what it was. I'm using platinum plugs where as before they were stock. a new msd coil and new distributor cap as well. the alternator, cranks when I turn the key but i'm assuming it's not starting because of lack of spark.

Thanks,
Chris