Pork loins don't take very long. I cook mine at 325-350, usually with a little cherry or apple wood for smoke. Cook to an IT of 135 pull and rest for 10-20 minutes and you are ready to go. I'm thinking cook time at that temp is somewhere around an hour to an hour and a half, just guessing at that though as I've never actually timed it.
Weber Performer with rotisserie ring, 22.5OTS, Maverick 732, Weber Smokey Joe,PBC Smokenator/Hoovergrill, variety of microbrews, Gin and tonic, variety of lighters.