Just got my 396 all buttoned up today and went to turn it over
When I turned the key -- nothing. I crossed the solenoid positive and starter terminal with a screwdriver. Turns over no problem. I have run into this with other cars and have never been able to figure it out. Any suggestions?

Automatic neutral safety switch?

Clutch pedal safety switch?

67 I presume?

See if you have 12 volts on the purple/white wire while key is in "start" position

See if you have 12 volts on the purple wire while key is in the "start" position.

See if you have 12 volts at the Starter's "S" terminal while the key is in the "start" position.

i just had that same problem...mine was a bad ignition switch, those tests he posted should tell you