72 340 pass side manifold

The 71 340 passenger side exhaust manifold sucks for performance. On my motor switching from a 70 to a 71 was eye opening. Why Mopar did it, I have no idea.
Anyone who isn't concerned about having their car all original should seriously consider the 96, 97, 98 Jeep Grand Cherokee passenger manifold. It has an exit hole very close in size to the 340 driver's manifold and fit extremely well in all A bodies (even early As with mods).