Has anyone tried using one of the Briggs and Stratton 550 series horizontal engine. They are 127cc, come in either 5/8 diameter or 3/4 diameter shaft and they are rated at 5.5 ft./lbs of torque. Would this engine work with the AGK jackshaft kit they sell for the predators? I was just curious if anyone tried one of these motors because they seem a lot more readily available to obtain than those HF 99CC predators that don't exist in california.