Thanks, I'm going to run a 8psi pulley once I get my new transmission.Depends on how much boost you are running and what fuel. Stock with some gap changes can handle most mild set-ups. I believe the NGK TR6 is the current one step colder plug which you shouldn't need anything more than that. Check the LSx forums for more info on specifics with the plugs and gaps.
Are you going to have it on the road before snow?