Personally, I wouldn't go any lower. Heck, I'm thinking of pulling mine and having it loosened to 4000 over the winter. If you've already got a 3000 stall (what size btw, 11"?) then rock it. I don't know if anybody has mentioned it yet, but ditch the radiator cooler in the radiator and get a good aftermarket unit, as big as you can fit/afford. You can't have one too big.