[Chaoslord]

id raise flop to a little more, 2500 or something, bet turn 4k (call shove) and shove river if you improve - like you did, probably check-call if it blanks because the way he played the hand hes gonna have a draw often enough to make it profitable.
as played i really dont like that river bet of yours, you should either shove and hope he has some 2 pair he can call you with or check-call depending if hes bluffy and good enough to turn a hand like A8cc into a bluff