If you want something more effective than a simple resistance check of the windings, chuck a distributor in a vise, and use a battery and some primary wire to connect the coil like it would be in an ignition system. Then spin the distributor with a variable-speed drill motor clamped to the oil pump drive. The high voltage lead that would normally go to the center of the distributor cap should be able to jump a 3/8"-1/2" spark to ground every time the points break if the coil is good. Some coils don't spark well without a condenser in the circuit for some reason.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!