Help...86 GMC intermittently dies

[Nickelcharlie]

Any idea why my 86 GMC will just die while driving and start right back up as soon as I can reach the key. It is a 305 automatic, fresh plugs, and new gas filter. I can go several days without it dying so until it stops running completely I can't really fix it. If it was electrical it would die and not start back up as is the case when the ignition module goes out. Has this happened to anyone here and do you have a possible solution as to what is causing it to die? Thanks in advance