I have a 89 iroc 350 engine stock that never had a tune up and I tried to start it one morning and the motor was just turning over but wouldn't fire up to were u can hear it idle so I change the distributor but don't think I lined it up right cause its still doing the same thing how would I know if I lined it up correctly and if it is.lined up what else can be the problem

 

This should be in the "3rd Gen / L98 Engine Tech" section, not the Classic engine section.