AKo on K high board, 180BB deep

[Gorgi24]

I have no read on UTG as he has been playing for only about 20 hands. MP is aggresive and donkish, I've seen him calling down with TPWK for a 60BB pot. We played a pot for about 50BB when he paid me off with J8o against my AJo on a Jack high board...

The table is raising to either 3 or 4 dollars...

0.50-1 NL. 6 handed

UTG ($95.25)
MP ($170.80)
CO ($86.55)
Hero ($182.32)
SB ($40.15)
BB ($97.80)

Preflop: Hero is button with Ac, Kd.
UTG raises to $6.50, MP calls $6.50, CO folds, Hero calls, SB folds, BB folds.

Flop: ($19.50) 8d, Kc, 4h (2 players)
UTG bets 14.00, MP all in 164.30, Hero????

I know I probably should have raised preflop, but the raise from UTG was big for the table and I didn't want to get 4bet on this spot...