In my 79 Formula with a factory W72 400 4 spd.. I up-graded to a 4 row Radiator and a 160 thermostat.I did this because I was having problem's with the car running hot on the free way and in the city traffic.Once I made the change's I had no problem's at all.In 2005 I drove the car to the Gathering of bird's T/A show in Dundee,Mi. where the temp was 94 degree's when I left my house in Wisconsin.The car ran fine at 70mph all the way with one stop for fuel.The only time the temp gauge reached 200 degree's is when I got stuck at one of those damn toll booth's.I always use the green anti frezze.Never tried anything else on the older cars.
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