My image TAG grinder. V is same, played a ton together. We're both tight. $1600 eff.

I open to $40 from MP1 with KcKs, V 3-bets to $160 from HJ, I flat because he'll likely fold all worse to a 4-bet.

Flop: Qd8d8h Pot $335 I check, he bets $200, I call.
Turn: 8c Pot $735 I check, he checks back.
River: 3h

What do you think of my line and what do you do on the river?