Handmade Mufflers?

[Jim78]

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?