interesting problem. im not sure it matters that the king is exposed in terms of your own hand, but the only thing to take into account is that it means that people pretty much dont have AK now, so its down to pocket pairs and AQ. it also means that you could get some interesting dynamics because they know you can't have KK or AK that often, so even if a K comes out they might stick around with something like QQ. 

just as a cursory analysis, i decided to give the other two guys top 5% ranges

Text results appended to pokerstove.txt
  16,152,965,136  games    12.033 secs     1,342,388,858  games/sec
Board: Dead:  
equity win tie      pots won pots tied

Hand 0: 24.511%   23.34% 01.18%    3769473432 189800144.00   { 99+, AJs+, KQs, AKo }

Hand 1: 24.511%   23.34% 01.18%    3769473432 189800144.00   { 99+, AJs+, KQs, AKo }

Hand 2: 50.978%   49.64% 01.34%    8017721520 216696464.00   { KK }

now if we remove 1 king, see what happens

Board: Dead:  Kd
equity win tie      pots won pots tied

Hand 0: 26.842%   26.29% 00.55%    1459056123 30494911.00   { 99+, AJs+, KQs, AKo }

Hand 1: 26.842%   26.29% 00.55%    1459056123 30494911.00   { 99+, AJs+, KQs, AKo }

Hand 2: 46.315%   46.14% 00.17%    2560453812  9673498.00   { KK }

actually makes more of a difference than i thought it would, probably because they have AK less often (and hence have AA more often), but it's still a great spot for you.