HU 25/50 really weird spot deep

[gordo16]

Villain (aba20) and I have quite a bit of history and after losing a few fairly big pots previously, I was definitely sure that he was tilting at the start of this hand. Now, I don't always 3bet AAxx against him, but given the flow of the game, I thought there was a good chance that he might 4bet and we could get it in preflop. Anyways, this is a bizarre hand because he is usually pretty tight and would never, unless on bizarro-tilt, check-raise turn with anything but the nuts (and I obv have the blocker)... How would you guys play this on every street and what hand range do you put him on here?

PokerStars Pot-Limit Omaha High, $50 BB (2 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($18859.50)
BB ($9620.50)

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">Hero raises to $150</font>, BB calls $100.

Flop: ($300) 8[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $250</font>, <font color="#CC3333">BB raises to $750</font>, <font color="#CC3333">Hero raises to $2000</font>, BB calls $1250.

Turn: ($4300) K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $3000</font>, <font color="#CC3333">BB raises to $7470.5