[68 P.O.S.]

Yes, as Coley said, timing is job #1 and always the first thing to set correctly before anything else. If your foundation isn't right, you're gonna be chasing your tail and redoing your work because you set it up on a crappy running engine. Since it still runs but doesn't "idle", you can set total timing to 36 instead of initial timing and move on to the carb from there. Once you set the transition slots, hook up vac advance, and set the idle, it should be running like a champ.