77 flops nutboat facing rivershove on 667JK board DEEP NL200

[ArgusSpets]

Villain seems a little donky - ok player. Maybe image is wrong (he once shoved AK on 237 board vs complete retard who called with 36 and K showed up on turn).
What is his shoving range once we get to the river 200BB deep? Obv. im afraid of JJ maybe KK/66, but alot other hands I beat such as A6,AA,67,65,6K (which is unlikely though);

Comments on all streets please:

PokerStars No-Limit Hold'em, $2 BB (6 handed) by Hand Converter CG

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

<font color="#C00000">Hero ($429.75)</font>
Button ($75)
SB ($132.65)
BB ($78.05)
<font color="#C00000">UTG ($388.20)</font>
MP ($161.80)

Preflop: Hero is CO with 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $8</font>, MP folds, Hero calls $8, Button folds, SB folds, BB folds.

Flop: ($19) 6[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $12</font>, <font color="#CC3333">Hero raises to $45</font>, UTG calls $33.

Turn: ($109) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets $75</font>, UTG calls $75.

River: ($259) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $260.2 (All-In)</font>

Hero tanks and?