Already in HU. Seems like an aggro villain, probably rec, few hands though

PokerStars - 30/60 NL (3 max) - Holdem - 2 players
Hand converted by PokerTracker 4

Hero (BB): 20.33 BB
SB: 4.67 BB (VPIP: 65.63, PFR: 42.86, 3Bet Preflop: 100.00, Hands: 33)

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has 9 8

SB calls 0.5 BB, Hero checks

Flop: (2 BB, 2 players) 7 6 T
Hero checks, SB checks

Turn: (2 BB, 2 players) 2
Hero checks, SB bets 2 BB, Hero raises to 4 BB, fold

Hero wins 6 BB

First, I don't know if iso allin pre is best against this villain. Do you ship it here?
As played pre, how do you play it postflop?
Is my raise in turn bad? I wasn't expecting any hand that bets pot sized here and with 100 chips remaining to fold
Is it better in general with nuts to just x/call turn and probe river, or even check-call river as he looks aggro and will try desperately to take the pot away with his last chance?
Maybe he checks back any pair though, don't really like the check-call river strategy

Thoughts?
Cheers

I'd shove preflop. I'd probably check/shove flop. On turn I'd probably shove.