Lonnie, glad you found it. You can advance the timing until it pings a little under load. And be quite sure you have it right. Fixing the short at the distributor was a very good bit of trouble shooting. No power to points = no spark. You have a base line on your timing light so I would use it just think in terms of a "correction" chart. Subtract 10 degrees from indicated and use it. Just my 2 cents.
