Need help with rebuild

In addition to Bill's commnet son the choke....Can yo pelase answer some troubleshooting questions?

- Can you better describe "rumble like it's going to start but won't maintain and stay running" ?
- Does it run for any length of time at all?
- Does it start but then stop running when the key is released from START to RUN?
- If it runs in the RUN position for any length of time, does it just die out? If so, suddenly or gradually?
- How did you set the ignition timing?
- Is this a points distributor? If so, is the points maximum gap at .018 to .021?
- Have you run a pressure check on the fuel pressure to the carb?
- Is there any fuel dripping down the throat of the carb after it tries to run?
- How did you test for spark? Testing across a spark plug gap is NOT an adequate way to test spark. The spark has to be able jump at least a 1/4" gap in open air to fire a compressed fuel/air mixture in the engine.
- Have a you checked the plugs for carbon fouling?
- Was the cam timing set with the crank and cam sprockets perfectly dot-to-dot?