330$ live - final table K7s vs chip leader

[Luisgallo]

330$ tourney at Caesars Palace, final table 5 handed.
blinds are 2000/1000/200

There is one big stack and 4 others with more or less the same amount of chips.


folded to Hero in the SB 45,000 chips
BB has me covered.

Hero has K7s.

BB so far has played very solid poker preflop but made some tricky play post flop, he is good.

I took dow few pots lately rasing preflop, my image at this point is LAG while in reality I am fairly TAG.

What's the play here?