Cliff
Here is a troubleshooting guide for Mallory systems
http://www.centuryperformance.com/ma...oubleshoot.asp
If you have a Unilight it could have shorted out if you did any welding or jumped the car off. Mallory does not recommend jumping a Unilight distributor equiped car or you can burn out the eye module.
Here is a warning from Century Performance on the Unilight module
"Anytime you do *anything* electrical on the vehicle ... I do not care whether you are charging the battery, changing the alternator, the starter, or anything at all on the car ... DISCONNECT the 3-wire connector from the distributor. This will guarantee you do not spike the Unilite® module. If you do not want to take a chance at spiking the module, this is the best way. Remember, it is not the module that is dying on its own, it is some other component (or human) that is causing the failure. You just want to make sure that nothing bad happens to your module."
If you do not do something stupid these modules are very reliable.
good luck