[cmayna]

My brother use to run 50/50 coolant/water in the 67. When I got the car I did not like the high temp while running the car at a pretty brisk rate or around town, so as I use in my old Mustangs and old Chevy truck, I replaced it with 70/30 distilled water/coolant and a bottle of water wetter.

Now the temp runs at a pretty steady 180-183. Much better.