I have this pump on a 327 in my '64 Corvette and it has been great so far. Motor temperature is very stable on warm days, and the pump itself probably weighs about half the original cast iron. Bolts to connect the pulley and fan assembly to the pump shaft flange so that the bolt shafts do not interfere. Additionally, the 1964 327 application requires a pipe plug in the top port and a hose barb on the side, both 1/2 in. NPT. None of these were included, so you'll need to get them separately from