The black one in fact is one of the greatest "classic" lookers `ve seen in a while...everything on it fits!
Concerning the exhaust: I have a 1 5/8" header with merged dual quiets on my oval (2176ccm type 1) as well and it doesnīt really feel underpowered. Maybe it would make some more horses with bigger tubes...I donīt know yet?!
If i remember correctly, Gene Berg sold merged dual mufflers that was good enough for high powered engines up to 200 horses. There are not that many engines out there, that have true horsepower, over the 200 mark.
I guess the dual mufflers sold at CB Performance today, have the same design and size, as what was sold at Berg Ent.