You're very good. I was a 6.5 index in 2008 and I'm probably a 15 now. I'm more likely to shoot 90+ than 80. My best score is 75 which I've done more times than I can count. However, my last ship tour ruined my game. I didn't practice at all for 2 years and I haven't really practiced much since leaving the ship either (so really, I've ruined my game). I just go and play. I occasionally play OK but have only broken 80 twice in the last five years. Can't drive (was hitting 300-yard drives in 2008 and when I crush it now, it might be 225-250 - if I'm lucky), irons are inconsistent, and I have the chip yips. I still putt well though.
You'd beat me like a drum.