Double check the ground, and make sure the cap on the Optispark unit isn't what's arcing instead.
No spark would usually be the ignition coil.
check g/box inhibitor switch could be out of adjustment
The first Chevrolet Caprice was produced in 1966. The Caprice was officially the Chevrolet brand's top-line series. The first Caprice series would go in production until 1970.
A flat camshaft could cause this if you have already ruled out wrong wire order and any other ignition problems. Each factor would have to be checked in order to determine the real problem.
When you bought it did they tell you it would have to be programmed by the dealership?
Needs a good tune up?
Ignition is required for an engine to work. Failure of ignition would prevent the engine working.
You may have a short in the ignition system.
a vac leak
the steering wheel..
ignition module
ignition of food or cooking materials