Fits Allis Chalmers 301, 2800 (4 Bolt Flang) Crankshaft Remachined 10/10 Rods & Mains 6 Cyl Diesel 4022491, 4020345, 4023823, 4022256 G2800, D2800, D2900, 180, 185, XT190 Tractors. Stroke: 4.250" |Rod Journal: 2.3720-2.3735" |Main Journal: 2.7465-2.7480" |7 Mains |Fits early model engines with cam driven oil pump and long (approx. 2 1/8?) front main journal length. Flywheel flange has 4 bolt holes and 2 dowel pin holes.