NL600$ AK river push with flush draw against donk

[Crashem]

Villain is Happyman on stars : 46/17/1.7
Seemed to be making moves with nothing against me. Saw him minrasing on the flop awhile ago with nothing.

PokerStars No-Limit Hold'em, $6 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

SB ($354)
<font color="#C00000">BB ($655.90)</font>
UTG ($354)
MP ($777.55)
<font color="#C00000">Hero ($600)</font>
Button ($599.40)

Preflop: Hero is CO with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls $6, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $24</font>, <font color="#666666">2 folds</font>, BB calls $18, UTG calls $18.

Flop: ($75) 7[img]/images/graemlins/club.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets $60</font>, <font color="#CC3333">BB raises to $120</font>, UTG folds, Hero calls $60.

Turn: ($315) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $78</font>, <font color="#CC3333">Hero raises to $456</font>, BB calls $378.

River: ($1227) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: $1227

Is my turn shove reasonable or should I just rather call his bet and wait for the river ?