[Jazzjr]

Try the Old School Trick, You may think I'm crazy, but its worked for Me for Years.
It ran when You Bought it, and once after. I think You are Flooding the Engine and Fouling the Plugs, every time You try to Start it.!

Pull the Spark Plugs Out, clean them by Sand Blasting them if you can, or use New ones gaped correctly.
Let the Cylinders Dry out for a Couple of Hours.
Make sure you have some kind of Fire at the Points, set the Timing. If you are using a Cap with Wires, make sure they are going to the Correct Cylinders.

Tow it By using a Tow Strap, to a Steep Hill and with gas on, key on, put Transmission in Second Gear, Coast down the hill, Let the Clutch out Slowly to try start it.
No Hill, have Someone Tow You on the Level.
Your Engine Will turn over 10 Times Faster than using the Battery.

Now I know You have done this in your Lifetime, what have You to Loose. Try it again...... Good Luck

PS: It has been Mentioned to do a Commpression Check, Did You? You may have a Valve Stuck Open and Not Seating.
By Towing or Coasting Down the Hill, If You have a Valve Open, It should Backfire when Trying to Start.