Looking to run a large single turbo on my truck in sig. Looking to make 800+(more is better) on fuel. Mainly a dd/street truck and occasionally going to pull it. Have been told to look into S475 turbos. Any thoughts, suggestions, experience on what kind of turbo along with compressor wheel sizes (if different than a 75),turbine wheel sizes and exhaust housing sizes. Also should it be gated or not? Going to run spray as well. Not concerned with a little lag. No twins. Thanx