Advice Needed - Can't Start Rebuilt 273

Are you 100% sure the wiring is correct. I'm talking about the run/start circuit and the coil? I also don't know if the compression is really an issue either. I've never checked compression on a new engine without the rings seated. Maybe someone else would know. Do you have good grounds for the elecrical? Do you have the engine grounded to the frame? I sure hope you get this figured out. If your thinking about dropping in a 360 I think your fun factor would increase too:)