I have had a problem with my 383 overheating at idle. I pulled the water pump and realized the pump only has 6 blades on the impeller and is only 3.5" in diameter (A/C pump on a non-A/C car). The service manual states that a non-A/C 383 should have an 8 blade impeller that is 4.3 inches in diameter. I oredered a new water pump from Year-One and it has 8 blades and is 4.3 inches in diameter but when the new pump, on the right, is compared to the old 6 blade impeller pump, on the left (attachment), I noticed the new pump has the impeller reveresed from the old pump. I need help. Which way should the impeller face? Since the engine turns clockwise (when facing from the front) it appears the 8 blade impeller is backwards. Can someone help me on this?