Stud/8: How Should I Play 6th and 7th on this hand?

[PokrLikeItsProse]

I started with 456 suited.

On fourth, I caught the 7 of my suit to get four to a straight flush with very live flush and straight draws. On opponent was clearly chasing a flush draw, the other a low-only hand.

Skip ahead to sixth street. I catch an 8 to make a straight (non-flush). My opponent drawing to a flush paired his board on fifth then made open trips on sixth, but he obviously does not have a full house. He will jam the river whether or not he makes a full house trying to get me to fold my straight. My opponent with low draw has made a six-low that is clearly a lock and he will also jam 6th and 7th. The pot is fairly large because I was very aggressive with my hand on early streets (not sure of the exact size, but it was multiple bets on third and a couple of players chased low draws until fifth before dropping out).

Mr. Trips bets out and the low raises him, so it is two bets to me. How do I play this?