whats my equity with 47s?

[JooWish622]

4 handed 2-4 game on full tilt. Villian is in the BB with 160 to start. I have 600

Tight-predictable oppenants.
I raise to 12 with 47c. BB raises to 20. I call.
FLop is 73J two clubs. Villian bets 40. My move? If I raise here, whats my equity? Id say my folding equity here is about 10 percent. I put him on AJ 10 percent of the time, AA/KK 60 percent. AK/AQ/JJ the other percentage of the time. At what stack size would this become more a calling situation?