67 Stang Overheating

[Rev]

I had cooling problems after installing a 306 in my '66 Stang. I thought that I had tried everything, electric fans both pusher and puller at the same time, 4 row radiator, high flow aluminum water pump, new thermostat, 40 Below, Shelby valance for extra air flow into the radiator.

Each thing helped a little, but nothing definitive. The problem was that the builder of my engine did not clean out the block and head water passages well enough. The remaining junk clogged up the brand new 4 row radiator thus making it 50% efficient. It worked like a great big filter. Replacing the new radiator with another new one fixed everything. That's what happened in my case.

Rev

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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.