Had KB 107 in my 360 for over two decades of street abuse now. Couple hundred thousand miles, bad pinging problems for a lot of those miles, three tear downs, three different sets of rings. Zero issues. I would use them again in a heartbeat.

Think hard about your CR, timing, and fuel choices. The 107s with unmilled j heads and a Mopar Performance distributor, I could get the thing to NOT ping even on premium. Changed to a stock distributor last spring and now it runs as just as good on 87 octane.