Factory 340 cars came with 3500 stall. The would brake stall a 2800-3200 depending on the torque of the motor. Same converter in a Big block car will stall at 3000-3500. I can remember installing a 727 out of a truck with 2200-2400 low stall converter. Turned the car into a real pig
In 1977 I bought a factory stock 1971 340 Duster with 8 3/4 sure grip rear end 3:91 gears and a 727 trans, it did not foot brake stall that high. Maybe The 1970 340 would stall like that.
