Go to:
www.rehermorrison.com to read the racers take & the sciende of it....it will be in the tips section.
Water wetter with 100% water works by far the best. In our drag cars thats all we use. In your vettes you need the additive protection of Dex or conventional antifreeze for the metals, but for ultimate cooling water alone with cool dow/watter wetter is by far the best for cooling. On my heads/cam daily driver I run NO antifreeze since I am in FLA and want the best cooling. The water wetter does add corosion protection.