|Install a bigger gas tank in your Classic Mustang.
If you have a '65-68 Mustang, it originally came equipped with a 16 gallon gas tank. It's super easy to increase that capacity by 6 gallons by installing a 1970 22 gallon gas tank. No modifications are needed. You just need the gas tank, a '70 Fuel Sending Unit, and one of the special filler necks listed in this post.
We have special fuel filler necks specifically bent for this conversion. Click on the links listed below:
ER-5591 65-66 Fuel Filler Steel Pipe / Neck For Use With 70 22 Gallon Gas Tank
ER-4981 67-68 Fuel Filler Steel Pipe / Neck For Use With 70 22 Gallon Gas Tank