68 chevy c10 cutting out intermitantly

[luke1968c10]

Hello, I think I'm posting this in the right place. My problem is that my truck will sometimes cut out just like I momentarily turned off and on the key. It always starts right back up immediately and there doesn't seem to be an obvious trigger. It is a 1968 chevrolet c10 with a 250 straight six, three on the tree. I've replaced the points, condenser, cap and rotor,plug wires, and plugs. I tried running a hot wire straight to the coil, and even tried a different battery. Anyone have any ideas? Thanks in advance.