I have a 74 360 engine. The water pump pulley I have on the engine is, part # 3418227. I bought this pulley on E-bay since I didn't have a pulley when I bought the engine. The engine originally had factory AC. I installed a Vintage Air system. The belt for the compressor and the alternator don't line up with the water pump. I'm using the original crank pulley. I need a water pump pulley that will move the groove of the pulley closer to the engine by about 3/4 in. The current water pump pulley's OD 5 5/8 in. A OD that is larger will hit the crank pulley. Do I need to replace the crank and water pump pullies?