Allis Chalmers | Agco Allis I500 Engine and Overhaul Kits. If you need help finding your parts, contact us here. Engine Parts offered range from complete overhaul kits to rod bearings, main bearings, pistons, sleeves, liners, rings, head gaskets, gasket sets, valve train kits, intake and exhaust valves, fuel pumps and much more for your Allis Chalmers | Agco Allis.