Tru Power Engine Kit. 3 Cylinder Gas, 158 CID, 4.2 inch Standard Bore. Engine Overhaul Kit. Contains standard pistons & rings, complete gasket set, pin bushings, cam bearings, intake & exhaust valves, springs, valve keys.Standard rod & main bearings. For 2000 Tractors (1965-1975), 3000 tractors (1965 & up).