How much torque can the stock clutch hold?

[TheBrian]

I'm asking because I'm trying to remove the crank pulley bolt, immobilizing the crank by putting the car in 5th and setting the P-brake. I think I put about 200ft-lbs on the breaker bar before the clutch slipped. I've got a Fenco P.O.S. clutch kit from AutoZone in there. 200ft-lbs doesn't seem like much for an engine that can make 140ish.