has spark and fuel, wont start.

I had the same type problem with my 70 Valiant. I ended up draining the battery trying to get the car to start. At first, I thought the car didn't have spark, so I checked my points and cap. It was getting spark and fuel, and I knew it was getting compression. My friend's dad told me that my auto choke probably went bad. I took my air breather off, took the choke off, shoved a screwdriver into the carburator to hold it open, got in the car, pushed the accelerator all the way to the floor, and started the car. Sure enough, it almost instantly started and stayed running! Since then I have replaced my choke, and have had no more problems.

If you have compression, spark and fuel, then it might be your choke.