[Z-linkCobra]

Doesn't sound fuel related to me sounds electrical. Check your grounds. Check your coil. If your coil is hotter then the center of hot pocket fresh out of the micro...could be a problem. What sort of distributor? Dual points, electronic pick up?

Cap and rotor? check and make sure the coil wire is good and not grounding out somewhere. Its just going to be a process of elimination. Electrical problems can sometimes be tricky as hell.