My brother just bought a pdr hx-40 for his 2001. He said I could have his stock hx-35. My question is would this be a good up-grade for my 93 d-250 vs. the stock hc-1? My truck has injectors and a 3. 5 inch exaust which I will up-grade to 5" stacks at a later date. I want 400 rwhp so maybe I should get a super-b but this turbo is free and has a waste-gate, how much better would it be? I can't afford a new turbo right now. Also how much better would the spool up be? Has any one done this up-grade:-laf