Looking for recommendations for a new turbo for my 2003 automatic pickup truck. My existing turbo developed a hole in the housing near the down pipe side! Cast iron! Incredible what years of salt can do to a vehicle! The truck is stock except for custom built trans from level 10 performance and 4" exhaust. Pull trailers during warm months and plow snow in winter months. Any recommendations on turbo size and or good company to deal with. It would greatly be appreciated. Frank