This B&M Traveler torque converter fits GM 1968-81 TH350, TH375B (will not fit TH350C) automatic transmissions and retains lock-up feature. Traveler torque converters are an excellent choice for stock vehicles, vehicles with light performance modifications, tow vehicles and RV's. They will increase the stall speed by approximately 300 rpm over a factory stock converter. The additional stall of the Traveler makes acceleration much crisper and fun to drive. Features include fully balanced and pressure tested by expert technicians and are manufactured to B&M's exacting tolerances for long life and includes new precision pump drive tube, heavy duty needle bearings, furnace brazed and new sprag and rollers in stator. Notes: Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. This converter is Not recommended for supercharged, plate-type nitrous oxide or trans-brake applications. The product images shown are for illustration purposes only and may not be an exact representation of the product. 10.75 in. bolt circle