High speed pinking

Sure- too much advance. 10 initial plus 30 at full throttle equals 40. Unless you build your own engines, experiment a lot with cams or have access to racing fuel, you should be running no more than 36 or 37 total for best power and less chance of engine damage. There's a rubber or metal sleeve that drops onto a post in most distributors to limit the amount of centrifugal advance your system can run up. This is most conveniently done off the engine on a distributor machine, but you can approximate it by trial-and-error.