Cjskotni The crane kit of heavier springs is no longer available. I found some ones that worked at ACE harware. Mike stiffer springs and or trimming the weight tips both slow the advance which will stop/slow pinging but you cant go too far & gas is crap & more octane might very well be needed. If you build a monster you gotta feed it what it wants (needs). Mike see what springs you have and find out at what RPM it stops advancing at and is your pinging at WOT or part throttle. what eng what SCR (measured or guestimated?) quench or no quench? what fuel (octane). that's 32 total WO the can added in? what initial what idle speed? ported or manifold.