1966 Dodge D/Dart ~ 'Mystery, Myth and Misconception'

* Doug Headers {Under-Chassis Type} > To be placed in the Trunk Compartment with a special 'Y-Shaped' Exhaust Pipe connector. {Headers to be installed by Racer}

The car would have left with the HiPo Y pipe installed? Alan's Y pipe may be what left in the trunk to be installed with the headers?