I'm now confused. either you have the engine turning or you do not? I thought you replaced the starter.

If you have spark and now the engine is turning over hard you have the timing too far advanced, it is trying to run backwards on itself. Simple fix, while cranking, turn the distributor a little one way or the other.

The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me