I'm building my D16Z6 (1995) for NA power, and wanting to know what kind of luck you guys have had running pg6 pistons. I was considering P29's but they look like a terrible design, plus I'm limited to 91 octane. What do you guys think? Also I've read about having the valve reliefs enlarged on the pg6's. Do I need to have that done? I'd like to run a Skunk stage 1 cam, stage 2 if I could get away with it. Any links to where I could buy pg6's in 75.5mm? Thanks guys!