[FireStorm]

Almost irrelevant what the others have. I would imagine it's obviously some combination of sets and big heart draws. BB probably has a hand like AxXxQhJh, etc, or the nut heart draw, and SB looks like he's got dry 55.

Up to you if you like a high variance play. You have twelve outs to the nuts when you include the straight flush outs, while you'll be fighting off redraws. The SF outs might be out of the deck, I doubt many of your wrap outs are. Equity wise, you're +EV here, but it's close enough that getting it in high is tight.