Thinking about buying a gtx55 for my sbf. Its a 3.25x4.125 with a solid cam turning8k+. Good set of Vic jrs flowing 335/258 @700. Question is would this be a good turbo for this combo and what about a/r size? The one im looking at is new and comes with the 1.0 but for alittle more I can get a 1.40.