The mtor in my blazer decided to let go today. Well, it still runs but makes a weird whistling pop back through the intake and knocks. I am planning on upgrading to a turbo400 ,208 or 241 or 205 or doubler205 or something with the tcase and d60 14bff combo. I was considering going with the 350 H.O that gm preformance has. I plan on doing mud boggs mostly with some trails. Probaly not any rocks. Just woundering what everyones opinion is on the motor choice. Money is not to much of an object as of now.