I had a lock-up converter in my 200-4R at first, I didn't like it so I called Cliff Ruggles and he set me up with a non-lockup unit from Continental, about 3400 stall. Drives great on the street and couples up nice out on the open highway with about 200 rpm slip. Engine is 505cid with 650 ft.lbs torque, street car not raced, so far it has not exploded