There was an interesting video that described nearly this exact scenario. I don't remember the video nor the author, but the situation was AA on something like T98f where you could be up against the nuts drawing dead or flipping. The other neat thing is that if you wait for a safe turn, your equity actually goes down.
I've partially re-created that here... I'm not going try to guess his entire range, but this stove should give you an idea of what the video was talking about... in this case you have the Kc. In the video example, he did not have the backdoor flush.
Bad equity
Board: 8s 7c Tc
Dead:
equity win tie pots won pots tied
Hand 0: 32.986% 32.01% 00.97% 31691 965.00 { KcKs }
Hand 1: 67.014% 66.04% 00.97% 65379 965.00 { QQ-77, AcQc, AcJc, Ac9c, Ac8c, Ac6c, Ac5c, Ac4c, Ac3c, Ac2c, QcJc, Qc9c, Qc8c, J9s, Jc8c, Jc6c, T8s-T7s, 96s, 87s, J9o, T8o-T7o, 96o, 87o }
Wait till "safe" turn card, and even worse equity.
Board: 8s 7c Tc 2d
Dead:
equity win tie pots won pots tied
Hand 0: 30.773% 30.77% 00.00% 1354 0.00 { KcKs }
Hand 1: 69.227% 69.23% 00.00% 3046 0.00 { QQ-77, AcQc, AcJc, Ac9c, Ac8c, Ac6c, Ac5c, Ac4c, Ac3c, Ac2c, QcJc, Qc9c, Qc8c, J9s, Jc8c, Jc6c, T8s-T7s, 96s, 87s, J9o, T8o-T7o, 96o, 87o }
Just an interesting thought. Play with the range.