Yes, it is possible to hook up two identical motors to one controller, but are you thinking about getting double power or getting steering? For double power hook them up in series. For steering you need a dual controller with two separate amplifiers. Vantec has this dual channel business down pat, their controllers have a built-in mixer, with exponential on the steering, adjustable everything, limit switch connectors if desired. There's a lot of options on one of their controllers.