KJs overs + backdoor with reg b vs b

Flop call seems fine as we have equity and villain is presumably cbetting nearly 100% of his opening range bvb.

I'm not sure what you are credibly representing on the turn. Granted, villain is likely double barrelling air but that flop and turn hit neither of you. What is your plan for the river if the turn semi bluff doesn't get through?

call turn, especially when he bets so big

I like it. You're both sooo FoS here though....