Thank you for the feedback. I've analyzed this hand and come to the following conclusions.
Flop $260 Flop : 6
4
3
I always bet. The optimal size is around $100, as I want him to call with all the overcards in his range, like KQ, QJ, Ax.
Turn $500 T
I have two options. Against a very aggressive player, if I have certain notes on him indicating he's capable of betting with 76, A4, or simply floating and betting with overcards, I play check-call and reevaluate the situation on the river.
Option 2. And this is the most obvious option against most recreational players: a bet of around $200-250. My goal is to target gutshots, pair+gutshot hands, like Tx hands that hit. For example, QT, AT, pairs 77-99, JJ. The size should be such as to keep these hands in.
River 9
$1000
I can play check/fold. Since there are no bluffing hands in his range that completely missed the board. If you think about it, it's only hands like 55, A5. Everything else has some pair, and recreational players are more inclined to go to showdown with such hands and check. Essentially, I need to see all-ins from him with hands like Tx and bluffs like 76x, 54x to make check-calling profitable.
I can bet $300 and fold to his all-in. Probably best?