3bet pot, nut flop against dkbet

iPoker - €2 PL Hi (6 max) - Omaha Hi - 5 players
Hand converted by PokerTracker 4

SB: €399.90 (VPIP: 84.47, PFR: 44.35, 3Bet Preflop: 4.38, Hands: 2,163)
BB: €106.00 (VPIP: 77.83, PFR: 10.86, 3Bet Preflop: 1.54, Hands: 221)
UTG: €512.25 (VPIP: 34.09, PFR: 15.38, 3Bet Preflop: 5.63, Hands: 2,891)
CO: €324.45 (VPIP: 34.04, PFR: 23.87, 3Bet Preflop: 8.66, Hands: 2,482)
Hero (BTN): €186.15

SB posts SB €1.00, BB posts BB €2.00

Pre Flop: (pot: €3.00) Hero has T♥ 7♦ J♥ 9♦

UTG raises to €7.00, fold, Hero raises to €24.00, SB calls €23.00, fold, UTG calls €17.00

Flop: (€74.00, 3 players) 8♦ 6♠ 5♥
SB checks, UTG bets €37.00, Hero raises to €162.15 and is all-in,

Preflop

std

Flop

easy game

villain is a good aggroreg most times

don't understand very well his halfpotbet on this flop

flop super monster, with nut straight, and redraw nut straight sup + 2bdfd.

obv the must would be allin against bare 79xx

But I don't know if his dkhalfbet rep more strenght or weakness.

i'm not fearing many turns (just cards that pair the board).
I thought about call/slowplay, making the pot big to see if oop he could feel commit (SPR ~1.2 turn) and go allin with low straight, set, some DP (that see a bdfd coming turn) or whatever.

Moreover, 7/9/T aren't super scarying turns if he got some straight.
I'm not calling flop just with a gutshot.
And 79xx are already nut flop, and he would thing that I would raise it most times
So with SPR ~1.2 turn he would feel ok to put allin his straights too.

But decided to go allin (not sure he would barrel turn too light if I call the flop)

But maybe in this specific case slowplay can make sense, and shoving flop is a little spew that monster ?