I have a Todd Nelson built CB 2.2 with his estimate of 300-400hp in my GLH. Running 3" mandrel past test tube into 2.5" mandrel and stock muffler, it's too loud. Want to go 3" mandrel all the way with mild throaty muffler in back. Want to drive the car daily in and out of town and be able to talk to passengers/wife. What muffler would do the job? Thanks, Steve