well, you're not going to run 27psi with any turbo on your stock block. But the turbo size would matter how much boost you run on your stock block. If you're running a t-25, or something along those lines, you can run more boost than if you were running a t-88 or something huge like that (I know it'd never spool, but it's for comparison sakes).

To answer your question, TE is a great place to take your car. I know the guys personally and if I had to have something done to my car that I couldn't do, it'd be going there. Chris, Gene and co. are very knowledgable and want whats best for you. They won't be selling you extra stuff that you don't need and will tell you how it is. You should really go up there and talk to the guys and see what you think. You won't be disapointed.