Tilly's Crawler Parts currently have in stock for immediate delivery New 3306DI Medium Block Assemblies options include - Block, Crank, Rods, Piston/Ring/Liner Kits 1.7" Pin/Keystone Rings, Big End & Main Bearings, Camshaft, Lifters, Loaded Cylinder Head which is only primary tensioned, Tilly's also offers the latest in Fully Reconditioned Second Hand Engine Components for Caterpillar & Komatsu Machinery generous stocks of quality New Parts available. Please contact Tilly& ...