exhaust woes ......1973 340 into a 1965 barracuda

They point right at the torsion bars. You've got the task of making them fit at that point with a tight bend and maybe some crushing to get 2.5" pipes to fit. Last I knew you could still get them from Layson's, don't know if they addressed that issue
As far as I know they are the same as when Harold made them. They are simply tubular exhaust. Not equal length, short tubes, and a turd to hook exhaust up to. Not much better than manifolds.