Best piston for street/strip 340?

I'm not sold on the kb's. They are a great way to make power and are left / right valve reliefs. I just replaced kb 107's with speed pro pistons in a 360. This motor had a little over 10,000 miles on it and popped the ring land of at the valve relief. They were gapped just they way the instructions said and timing was set at 32 degrees total. The top ring is very close to the top of the piston and takes more heat. I would run them again but it would be a race only application where I new for sure what my fuel octane was. I now others have had good luck with them in daily drivers and that's what we would expect, just not for me.