Get short glasspacks, louder than any muffler on the market when done right IMO. I have 18" glasspacks(12" chamber) on my truck with 2 1/4" pipe and it will rattle windows and set of car alarms, guaranteed.
The mufflers(or lack of them?) are right under the back of the cab, and the pipe exits under the rear bedsides between the tire and bumper. The 350 is stock so it doesn't lope that much when idling but once I get that new cam with solid lifters in there...............
