Dual Exhaust Conversion

I just checked and they do offer a 2 1/2 pipe kit for 67-69 A-Body Barracuda. Trouble you may have is I know on my '67, it is extremely tight on the passenger side getting between the gas tank and the shock. The guys who did my custom exhaust had concerns of fitting a 2 1/2" pipe through there and suggested 2 1/4" instead.

There are also a couple footnotes on the TTI site. One is asking if the transmission cross-member is notched for dual pipes. The other asks if the leaf springs are in stock location, or if they have been moved inward.

Here's a link:
http://www.ttiexhaust.com/MoparClassics-Exhaust/Exhaust_Syst_MW.htm