Had something like this happen 2 years ago. Did a tuneup, Points, cap, rotor, plugs, wires, and condenser. Fired it up. Set the timing with a dwell meter, and a vacuum gauge and went to the next Town. About 20 miles round trip. Ran great. Then it stopped in the intersection. Yep right there in the left turn lane. Less than 2 blocks from home. Busy street, lots of visibility, and some embarrassment(of course). Got out of the intersection, and parked(safely). Looked and looked for the issue. Found it...the "rubbing" block on the points(new, brand new) was gone. Put the old points back in(they were in the glove box) set the gap by eyeball. It started up and went home. Simple truth, if them points do not open, there will be no spark. New points...brand new points. Oh well. The condenser like cletis said will do the same thing. No spark. So will a bad coil, or bad(open) ballast resistor(if you are running 12 Volts). Things to check. One at a time to find the issue. Just one at a time.
