So, out of the 23 hands I played with this guy, it was clear really quickly that he was running like a god. Not only that, but he was playing like a total donk on the final table (which is not too surprising, since it was a $400gtd), open limping, limp jamming AK, and overbet jamming about 5 hands previous to this one.

I think the call here may be technically correct, and considering that villain has been regularly jamming to push people off pots (never showing down), that makes me feel okay with a call. But at the same time, the field is so weak and we hold a nice stack -- so a fold might be better. I really couldn't figure out what hands would take this line either (from a logical player), since most sets would 3bet here, etc.

Any advice?

Winning Poker Network (Yatahay) - 3,000/6,000 NL - Holdem - 6 players
Hand converted by PokerTracker 4

UTG: 26.51 BB (VPIP: 24.24, PFR: 17.46, 3Bet Preflop: 0.00, Hands: 67)
MP: 20.75 BB (VPIP: 31.82, PFR: 22.09, 3Bet Preflop: 6.90, Hands: 91)
CO: 5.76 BB (VPIP: 35.91, PFR: 17.98, 3Bet Preflop: 4.55, Hands: 183)
BTN: 33.08 BB (VPIP: 18.18, PFR: 9.09, 3Bet Preflop: 3.85, Hands: 56)
SB: 77.12 BB (VPIP: 27.27, PFR: 18.18, 3Bet Preflop: 20.00, Hands: 23)
Hero (BB): 35.12 BB

6 players post ante of 0 BB, SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 2.1 BB) Hero has 9 8

fold, fold, fold, fold, SB calls 0.5 BB, Hero checks

Flop: (2.6 BB, 2 players) 7 9 8
SB bets 1 BB, Hero raises to 2.98 BB, SB calls 1.98 BB

Turn: (8.56 BB, 2 players) A
SB checks, Hero bets 4.95 BB, SB raises to 73.04 BB and is all-in, Hero ?

I'd raise more on the flop. Call the turn check-jam. He can still have heaps of draws and one pair Ax.

Never folding considering the prize pool

I agree, this could even be him getting tricky with AK/AQ.

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He's way too weighted to draws. The best hand I think he'll show up with here is A7, since Ax will at least raise pre a decent % of the time. Straights and sets will be pretty rare, since 77-99 will raise pre and two pair/straights might reraise the flop on a wet board. I guess he can have JT once in awhile, but he probably wouldn't check-jam hands this strong, he'd check-raise to a smaller amount.