TPI car. Headlights and everything shutoff. Power comes back on and engine picks up where it left off after half a second. It only does it after the engine warms up.. been fighting this demon for a while and I'm about to give up on it. Engine operates perfectly other than hard accel but whats the fun in that. So far I've added a couple grounds. pulled and cleaned all the existing grounds I can find. Brand new battery. Newer but stock amp alternator (its a built 383) new distributor, new ignition coil, new ignition control module, new map sensor. It has to be something electrical right??? Please help

 

Sounds like the battery is shifting and the negative cable is straining.