ORIGINAL: Jeremiah 29:11
Interesting. I too had glass packs and they will make any exhaust sound bad especially when the fiber glass wears and is blown out. It then gets really loud.
Speaking of loud, the best (or worst) thing I ever had happen was pulling out of a grocery store parking lot with my 70 Challenger (a 318 with single exhaust) and the muffler literally fell off. INSTANT loudness, right in front of a cop car. His light immediately come on. Fortunately, there was a Midas muffler store right down the block, so I pointed to my muffler laying in the parking lot drive way. He followed me down the street and waited till he saw I was talking to someone from the muffler shop.