Had a GearVendors on a tow rig and on a Super Comp dragster. Both worked great and IMO are well worth the money!!!! Hoping they can come up with one for the back of a TKO 600 by the time the Ranchero is ready for it!!!!! 3 overdrive gears behind a 700 ft. lb torque engine should overcome some of the aerodynamic challenges my limited knowledge of aerodynamics has created!!!! Sure wish somebody would come up with a virtual wind tunnel!!!!!!