Even the long block is different. Basic design is the same though. The PT Snoozer is front wheel drive, so all of the exhaust and intake plumbing is going to be different. Engine management is going to be a nightmare because of the way Chrysler sets their computers up. Is it doable? Sure. Would it be worth it? You'll have to make that call. It would be easier, cheaper and faster, plus give better results, to slap a GM Gen IV V6 or V8 in with a Novak kit and call it a day.