I think I sit at about 70%. Wait for feedback from others, but my opinion is that this hand is just too bad. You will likely end up in situations where post flop you are cbetting with not much real equity / trying to bluff rather than having some decent opportunities to value bet.
There are a reasonable percentage of flops that contain a 6 where you are still going to have an awkward time with the hand. Qxx boards are you value betting or bluffing? How well does a 8 high flush draw play? All these boards where you have something and if you bet and get called you are unlikely to be value betting your hand.