Best piston for street/strip 340?

A little off topic, but when a friend wanted his '70 Challenger 340 convertible rebuilt, we found '72-up 340 replacement TRW forged (8.5:1) inside with the X-heads, which was really holding it back. The deck clearance was close to zero, so we did a Magnum conversion on it to get the compression up and get some better flow (velocity). He said it felt like it gained 100hp-LOL-but regardless, we did get some quench. Another buddy has a '69 340 Dart running the positive-deck KB hypers with "J" heads and has countless trouble free miles. I have run the KB-107s in 360s and some BB KB's with good results, so I wouldn't hesitate to run them in a 340. FOLLOW THE RING GAP INSTRUCTIONS!!