I was cruising tonight and the car was running good. After diving around all night and going home on the highway I decided to put the pedal to the metal. After a few short seconds of killer accelaration my elecrical system gave up. All lights, elecric fuel pump, Gen lights everthing elcrical is dead. I have no electrical power what so ever. My car has a MSD 6 ignition with HEI ditributor. Electrical is dead with or without ignition. I have optima red top battery. Connections to battery look solid and clean. Where do I start?