As said verify the dampener ain't slipped by checking/confirming exact TDC with the tool in the spark plug hole. its somewhat rare for it to slip but your (timing) numbers being reasonable with your good gas it should not be pinging. what RPM does the springs max at? pings at part or WOT? or both. EDIT I reread & saw the 9.7 SCR, if all good you may (highly likely) just need more octane cuz if your dampener ain't slipped your numbers are actually very reasonable unless possibly it is coming in REAL fast, what is your cranking compression. proportioning in some av or race gas works. if you build a monster you gotta feed it what it wants/needs
