When Mustangs were rolling off assembly lines decades ago, there was no such thing as a factory installed coolant recovery system short of the expansion tanks in full-size Fords. For Mustangs, coolant forced out by engine heat dribbled onto the pavement and you added more as necessary.
If you're like most of us, you want improvements that contribute to your driving pleasure but you also want to maintain an original underhood appearance. How do you save coolant yet keep the original looks? You have two options. Install a catch system no one can see or opt for something in plain sight that looks tasteful or factory installed.
At Summit Racing Equipment, we discovered that Canton Racing Products and Be Cool have quite an array of aluminum coolant recovery tanks for classic Mustangs, including some you may not have thought about. They can be installed in plain sight or hidden where all anyone sees is an overflow hose. It looks stock and no one knows it's there but you. You can also use a windshield washer reservoir, available from Mustangs Plus, or a late-model coolant recovery tank offered by Latemodel Restoration Supply.
Sometimes the best stealth mod is the one hidden in plain sight. When you can make it look factory installed, you're ahead of the game with a functional modification that will serve you well. You can also place it completely out of sight in a fender well where you have easy access.
A Word About Caps
Canton expansion tanks do not include filler caps. While we'd like to see cool billet caps for these tanks, the Canton expansion tanks call for the use of a stock Ford plastic cap, available from Summit Racing Equipment.