The best sounding vehicle I ever had was a Ford F150 with a 460 with a fairly big cam. It had a set of glass packs on it. The exhaust came out and over the rear end then turned down and the sound hit the ground and made it that much louder when outside the truck.
It may just be me, but glass packs sound really good on big motors.
I can't stand to hear some of todays motors and high pitched mufflers that some people use.