I have a vintage Mallory coil that says for transistor ignition.   What could be the difference. Can I use it on a points distributor with or without a ballistic resister. 

If using that coil with points you will need a ballast resistor otherwise the current will be too high for the breaker points. First measure the coil primary and see what it is. I'm guessing that being for a transistor box the coil primary resistance is probably lower than that of a standard coil which in that case would produce even higher current. Very generally, in a 12 volt point system, the coil would be about 1.5 ohms, another 1.5 ohms for the ballast and that's what the points can live with.  Hope this helps....

64F100 57FAIRLANE500

Thanks, sounds like a plan