I got your answers to my good/bad power valve post, and now my question is this. (( I came from 4'000 foot hight to 300' foot hight, aprox 3700' foot difference)) If I replace the P/V, should I go with one that is smaller (ie:lower # on the front of it) or bigger, or stay the same size. I dont know what I have in it yet. Running a Holley 750 DP on a pumped up 440. Thanx..