So my 06 F350 XLT didn't come with factory keyless entry. I know there are tons of aftermarket systems that would add alarm and keyless entry to my vehicle. But my question is, would it be possible to install a factory keyless entry unit to my vehicle so that I could also install the keypad on the door? I know the ford factory keyless entry unit I need is part number 2W7J-19A498-AA. But I am unsure about how the security system hooks up and if it would be possible/worth it to install factory oem keyless entry or just go aftermarket. Any help is appreciated.