Aeromotive recommends starting with a brand-new fuel tank, so you don’t blow yourself up from a stray spark—good idea! Since our ’65 El Camino still had its original fuel tank, we opted for a new stamping from Original Parts Group, along with a new fuel-sending unit. We knew this was going to be a good swap when we noticed the two 5-inch-diameter flat areas near the front of the tank. This was a perfect place for the Phantom kit in the deepest part of the tank. We checked and Chevelle tanks offer these same flats.