Advice Needed - Can't Start Rebuilt 273

This I don't get. "Hitting against the starter" is caused by compression, fuel, and spark, and too much advance. If it's got "enough" to hit on the starter, then the darn thing SHOULD run.

Yes, i agree, but, it won't. I tried advancing it way up (not shown in video...timing in video is 10*BTDC and I advanced it a few during the video) and still won't start, but does hit against the starter. If I have my timing light hooked to #1 and pointing @ the damper, it will flash at 10* advanced on the tab while cranking, so that tells me that the timing is bang-on (factory initial advance is 10*BTDC).