Fifty years after Evel Knievel so famously wiped out trying to jump the fountain at Caesars Palace in Las Vegas, action sports wild man Travis Pastrana will try to nail the stunt Sunday night in the finale of a triple-header tribute to the late daredevil. It’s a daunting proposition even for Pastrana, who is winding down a career in which he’s done some pretty crazy things. If he sticks it, what a way to go out. “For me, this is going to be really awesome,” Pastrana said in a phone interview. “All my family is coming out and so many…