Could not find anything in searches on this item. I have KC big block with edelbrock waterpump and the crank to waterpump ratio is 1:1. I called Edelbrock today to ask their opinion on changing that ratio to increase the flow of water. They informed me that they recommend the pump run at .7 that of the crank. (cavitation a concern) Has anyone trialed different pulley ratio's with an edelbrock pump? Wonder if I slowed my pump down if it would cool better? Not sure if I am going to have an overheating problem this summer, just trying to figure out my options if I do.