Well, don't be looking at file 13 just yet. You said you heard it run, so it has to be something fixable. Follow FC's compression check first. You should see something in the 130-180 psi range. Below that, you're gett'n weak.

Did you change the cam or replace the timing chain? If so, any chance you're a tooth or so off?

You said drained the cylinders...maybe it's flooded??? Keep your foot to the floor on the accelerator and see if it pops over after cranking on it. Maybe you're dumping too much gas to allow it to spark.

The only "logical" things it can be is:

1.) No Spark (bad ignition module, coil, no power, gear not engaging, coil wire arcing not allowing spark to plugs)
2.) No Fuel (or too much fuel)
3.) Wrong Timing (distributor, cam in wrong location)
4.) Zero Compression (bad rings, worn cylinders)
5.) The starter is not turning the flywheel (threw that in for fun)

You've just got to rule these things out one at a time. If you really suspect the spark is weak, try a different distributor and wire it up hot to the battery post.

Best of Luck dude...we all have engine troubles...that's why we're here!

tj