Originally Posted by Diseasel300

I know you posted above that you replaced the distributor cap and rotor, but have you pulled them off to check their condition since this problem has been going on?

Additionally, is the OVP you installed used, or is it brand new? If it's a used one, I'd suggest replacing it with a new one. When they get flaky, they can be maddeningly difficult to troubleshoot.

If you're handy with a soldering iron, it may be well worth your time to take the cover off the MAS relay and look for broken solder joints on the pins of the circuit card and the pins of the relays.