When I bought my '78, it had only 24K miles and appeared to be very original throughout. The exhaust system was nothing short of terrible with a really ugly Y-pipe, and catalytic converter shoehorned in. What I found most interesting were the stainless steel mufflers which appeared to be hand welded. I can't imagine that there weren't "off the shelf" mufflers that would have worked fine. Were these hand-made mufflers really original to the '78 Avanti? Has anyone else encountered these? I was cleaning out the garage and found that I still had the mufflers. Is there any value to them beyond scrap?