Are you guys kidding me? No turbo means your not interested? I think some of you are choosing to remain delusional. Its going to have 260/260 BEFORE turbo. So with a safe tune your looking at 360 with a turbo! Not to mention that with 3.8L i'm sure there is some room in the block to bore and/or stroke it a bit. You could pesumably be looking at a 400hp and god only knows what kind of TQ out of this motor with an ok tune.
260 is a very good starting point for a turbo build. I'd rather have this and add a turbo, then try and turn up the boost on a stock system and over work all the components until premature failure.