I've used Water Wetter and the more expensive 40Below with mixed results. When I was trying to use these products, the real problem was that my radiator was occluded. These mentioned products seemed to help a little but not enough.
After I had my radiator rodded out, it was like night and day. The car now ran at 180-190 F no matter the ambient temp.
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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