he's running at 23/18
at the time his 3b was not very high, 6%

if he ships in his AK as a 10 out semi-bluff I have OK equity, but he overbet the turn so I'm a little short on equity if my range is correct

Board: 4d 3s 5d 4h

Hand 0: 65.632% { QQ+, AKs, Ad6d, Ad5d, A4s, A2s, AKo }
Hand 1: 34.368% { ThTs }

Full Tilt No-Limit Hold'em, $1.00 BB (5 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

BB ($101.45)
Hero (UTG) ($117.25)
MP ($101.50)
Button ($121.55)
SB ($61.50)

Preflop: Hero is UTG with 10, 10
Hero bets $4, MP raises to $11, 3 folds, Hero calls $7

Flop: ($23.50) 4, 3, 5 (2 players)
Hero checks, MP bets $16, Hero calls $16

Turn: ($55.50) 4 (2 players)
Hero checks, MP bets $74.50 (All-In), Hero ?