The standard panel "tilt" on the RV-6 is 8º.
Now, having said that, I've just finished installing a Dynon D6 in 2 other RV-6s. The interesting thing is that one of them had the panel tilt at about 10º, and the other is at about 6º. So you might want to measure to be sure.
The 10º panel is in a slider and the 6º is in a tip-up. My tip-up panel is 8º.