It does not appear that the base Mach 1 has dual fuel pumps. I pulled back the carpet to look for the dual fuel modules that are present in the GT500 and there is nothing there, exactly like the 2016 GT. I suppose its possible they could have been moved, but I doubt it. Let me know if there is any other obvious place to confirm besides pulling up the back seats...I don't have the energy for that for a while.
If the fuel pump and more importantly, the pickups, are done right you don't need dual pumps. The ZL1 and SS 1LE Camaros don't use dual pumps, instead they have pickups in the 4 corners of the tank to make sure they don't starve the pump.