Another 25/50 deep stacked NYC hand

[rock1]

Villian and i have developed a history of playing big pots (which he has gotten the better of lately)...early on there was a lot of bluffing, while in the last two sessions its been big hands vs big hands...last session, i lost 25k on a hand where i turned nut straight and he rivered a runner runner flush after betting every street...

hero starts hand with ~16k and villian covers

on to the hand...limp in EP, raise by villian to 300 ,2 callers, and i call in BB with KcJc...

pot 1500, flop Ks 5c 2d...i lead for 1500, and only villian calls...

pot 4500. turn Js

i definitely made a mistake here i think...i check, villian bets 4500, and i talk myself out of check raise...i call the 4500...

pot 13500, river is 6h...

questions
1. I understand that i played the turn poorly...what do people like as the correct turn play?

2. Assuming i played the turn as i did, what is your plan of action on the river?

i think this hand is standard if the stacks werent so big...but given stacks, give me your best line.