Aftermarket trailing arms are also permitted, but they must attach in the stock locations. This car is wearing UPR uppers with stock lowers. An aftermarket sway bar was installed by the previous owner, but Hernandez says he'll probably remove it. Note the sumped stock gas tank. The previous owner modified the tank for an external pump, but Hernandez capped the fittings and installed a Walbro in-tank unit. Though it was the less expensive option, it will deliver enough fuel for the engine.