I have a taggy image, haven't got out of line, running like 20/14 ish. Villain is solid tag as well. Not many hands with him andhe hasn't gotten out of line either.

Is this a +EV bluff if there is such a thing?

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

UTG ($196.50)
Hero ($100.10)
CO ($60)
Button ($161.05)
SB ($78.35)
BB ($103.65)

Preflop: Hero is MP with 8, 8. CO posts a blind of $1.
1 fold, Hero raises to $5, 2 folds, SB calls $4.50, BB calls $4.

Flop: ($16) 9, K, 9 (3 players)
SB checks, BB bets $5, Hero raises to $20, SB folds, BB calls $15.

Turn: ($56) 6 (2 players)
BB bets $10, Hero calls $10.

River: ($76) T (2 players)
BB checks, Hero bets $65.1 (All-In), BB folds.

Final Pot: $141.10