Want a truely different sound than the Smitty's (in my opinion they are a little raspy at throttle) try a pair of Chambered mufflers. They are the same units that the 60's Corvettes used in their side pipes. They make a very mellow rumble at idle and cruise but really bark at throttle. They are available from Mid-America Corvettes in Illinos. Just ask for the mufflers only. They come in different lengths. I used the 3" dia. x 18" long.
Several Inliners on this board have heard them and they do say it is a different sound!
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1940 ChoppedChevyCoupe