[nkaminar]

Sounds like you have tried just about everything. I would go with 700RPM's suggestions. I would disconnect the wire from the alternator to the light switch to eliminate any problems in the headlights, tail lights, etc. Also check the fuse. I use an electrical grease there. You can temporarily wire up the coil directly to the battery to eliminate any issues with the ammeter and ignition switch or fuse. For the timing, take #1 plug out and turn the engine over with the hand crank until the distributor rotor is pointing to that plug, or a little before that. Then use a stick or wire to feel when the piston is at top dead center. Adjust the points to open when the spark lever is retarded at that position. That eliminates any issues with the cover bring Model B or not. At the same time look at the valves. They should both be cracked open just a touch. That will check the cam timing which could be off.