Hey There,

are you running a ballast resistor in series before the coil?

It could be that this resistor is bad.

Simple and obvious: might the engine be flooded by now? You could pull a plug and see if is "wet" inside.

Can you do a compression check? Maybe the rings are binding to the pistons since it been sitting a while and your compression could be nil.

Do you have the right point gap? Should be .019" I think.

How about the firing order? Timing? Does the dizzy point to the #1 plug when the engine is at TDC?

Keep us informed,
Elias