I have basically a stock 350 that I use for oval track racing, to conform to the rules we can only use a stock system with a max 4 core rad, does anyone know what the best way to provide more cooling as my car seems to run hot (over 250 deg.) I have tried wetter water, blowing out and straightening all the fins, I have had the rad clean by a shop. I have tried different size washers in place of the t-stat. WHAT AM I TO DO?