Exhaust for a 1973 Duster 340 (Pics Included)

You can do headers if you want, but if the engine is stock or close to it, I would just come off the manifolds with a good dual exhaust system with something like Dynomax Ultraflow mufflers with tail pipes in the stock location.
Ya I heard a lot of people like the Dynomax Ultraflows. So, would I just need to buy the mufflers and have the shop do the rest?