[Dick Carne]

My recollection of some of the original exhaust whistles is that they would mount just before or in front of the muffler, under the car. Of course these were hard to find, so when the reproduction whistles came out, they mounted instead at the junction of the exhaust manifold and the muffler/tailpipe connection. The main problem with most exhaust whistles was that they would often not fully close back off once the connector chain (and valve) had been released, often leaving passengers to listen to the blow by through the whistle pipes until the valve opening returned to its fully closed position. Regardless, I would not encourage anyone to place a whistle behind the muffler itself, as the sound would be substantially diminished. J.C. Whitney used to make such a whistle that fit on the end of the tailpipe, but it produced nothing like the sound or volume of those placed in front of the muffler.

One other thought is that if the muffler is cut to allow for the whistle to be installed just in front of the muffler itself, it might prove expensive to remove the whistle from along the exhaust pathway of the muffler and return it to its original shape in the event that it did not produce the desired results.

Good luck with this regardless. There are few of these on cars these days, and the sound that they emit when on the open road is amazing in its similarity to that of an old locomotive.