I the crack did not get it to fire I doubt you have spark at the plugs, especially if the plugs were dry. Did you smell gas on the plugs or emanating from the cylinders?
Next confirm spark at the end of a plug wire while cranking.
Be sure the water intake is closed too.
Did you look under the distributor cap? On rare occasions I have seen spark at the coil but not at the end of the plug wire on tose occasions it was a broken rotor.. I had one fail on the frwy in my Corvette once too~~really exciting at that moment
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Dave Neptune