Has anyone purchased an exhaust from WALDRON ANTIQUE EXHAUST. They have there own website and the owner's also own a 69 Firebird Conv, which they use on the website to show the different sounds there muffler's make. They seem to understand the difference between the Convertible/Coupe exhaust. They also have these muffler's which look like the original ones, but have a better sound. They call them "Imposter". The website shows how they sound and they seem pretty neat.. Well I'm looking to order a kit with two Imposter for my 67 conv. Just checking to see if anyone here has dealt with them in the past.