Tru Power Engine Kit. 4 Cylinder Distillate, 152 CID. 3-3/8 inch Standard Bore, 3-7/16 inch OVerbore Supplied. Flat-Head Piston, 5-1/16 inch Valve Length, Late Crank. Basic Engine Kit, less bearings. Contains sleeves & sleeve seals, pistons & rings, pins & retainers, pin bushings, complete gasket set, seals. For H Series, O4 Series.