Economical converters are engineered for mild performance applications and are completely remanufactured with new pump drive hubs and thrust washers. GM 700-R4 and 200-4R converters retain stock lock-up feature. Exact stall speed of the converters listed will vary, depending upon engine displacement, torque output and vehicle weight. THESE CONVERTORS HAVE A 1/2" THICK MOUNTING TAB. USE ARP230-7303 OR EQUIVILENT 7/16"X 1-1/4"UHL MOUNTING BOLTS.