340 exhaust manifold vs stock 318

Don’t forget the 72-76 340-360 manifolds. They are not as good as 68-70 340, but are much better than 273-318 due to port size.

71 was an odd year. The pass side was log style like later years. Don’t know about Driver side.
So the left side of these will work on the a bodies?
It seems the left side has the least options available