5/10 Stars. Trying to bluff a TPTK

[Mad Genius1]

Preflop call is marginal I know but I was about to end my session and I wanted to play a hand before I did (bad reason, I know). I'm interesting in hearing thoughts about my flop turn and particularly river play. I put him squarely on AK after the flop with an outside chance of AA, am I wrong to think I can bluff him off that hand? FWIW, I wasn't doing anything out of line before this and neither did my opponent.

PokerStars No-Limit Hold'em, $10 BB (8 handed) converter

SB ($762.75)
BB ($1003.50)
UTG ($454.35)
UTG+1 ($1081.75)
MP1 ($1062.50)
MP2 ($994)
CO ($312.30)
Hero ($1022)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
UTG calls $10, <font color="#666666">1 fold</font>, <font color="#CC3333">MP1 raises to $40</font>, <font color="#666666">2 folds</font>, Hero calls $40, <font color="#666666">2 folds</font>, UTG calls $30.

Flop: ($135) 5[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, <font color="#CC3333">MP1 bets $70</font>, <font color="#CC3333">Hero raises to $140</font>, UTG folds, MP1 calls $70.

Turn: ($415) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets $240</font>, MP1 calls $240.

River: ($895) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, <font color="#CC3333">Hero bets $602 (All-In)</font>