Truck randomly doesn't want to start, will later.

[toolman21]

Normal service. Head was rebuilt 8k miles ago or so. New timing belt, plugs, wires, coil, distributor cap, rotor, etc during that time.

Plugs look exactly as they should. Not black or brown.

At this point I think it is the ignition switch or the distributor.

Is the distributor serviceable inside or do you just have to replace it as a whole unit?