This is a new block that has been sitting in it's shipping box for over 20 years. The protective coating on the cylinder walls has hardened. I cleaned up the cylinders, they look good however, i would run a ball/flex hone in them before assembly. May be the same block as on the 65-70hp? Includes block and crank case, rear block cover, intake transfer cover, inner exhaust baffle & box of bolts.