MP+1: 110.8 BB (VPIP: 17.71, PFR: 12.86, 3Bet Preflop: 3.20, Hands: 356)
CO: 100 BB (VPIP: 17.42, PFR: 9.69, 3Bet Preflop: 1.95, Hands: 824)
BTN: 96.4 BB (VPIP: 21.43, PFR: 7.14, 3Bet Preflop: 0.00, Hands: 57)
SB: 118.6 BB (VPIP: 13.44, PFR: 9.14, 3Bet Preflop: 5.19, Hands: 190)
BB: 102.8 BB (VPIP: 18.06, PFR: 10.73, 3Bet Preflop: 4.99, Hands: 1,681)
Hero (UTG): 123.6 BB
UTG+1: 108.8 BB (VPIP: 12.16, PFR: 10.81, 3Bet Preflop: 5.66, Hands: 149)
MP: 105.8 BB (VPIP: 19.19, PFR: 15.95, 3Bet Preflop: 5.13, Hands: 376)

SB posts SB 0.4 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has Ac Kc
Hero raises to 3 BB, fold, fold, fold, CO calls 3 BB, fold, SB calls 2.6 BB, fold

Standard

Flop : (10 BB, 3 players) Kd Js 7c
SB checks, Hero bets 8 BB, fold, SB raises to 21 BB, Hero calls 13 BB

Bet slightly bigger here for value vs some straight draws etc. Pretty standard.
Villains check raise flop% is 6% over 190 hands. Not really what sure he is representing, maybe 77/ JJ/KJ. But presume he'd 3b JJ pre. Doubt he'd do this with q10 as he's a bit nitty. I decide to call as I have position with TPTK and back door flush/straight draws.

Turn : (52 BB, 2 players) 6c
SB bets 28 BB, Hero calls 28 BB

Pretty standard call for me considering the passive flop line I've taken. Still think he likely has 77 or KJ.

River : (108 BB, 2 players) 6d
SB bets 66.6 BB and is all-in, fold

Getting an okay price but decide to fold as I doubt a nitty player c/r flop then barrels with missed draws etc. Most likely filled up on the river. Either way Im only bluff catching.
SB wins 103.6 BB

Questions
1) Should I just gti on the turn even tho given equity is pretty low vs his range. Or is this passive line okay vs nit?