1972 340 exhaust manifolds

I'm pretty sure the left side manifold is for B&E body.

That's correct. I drug a drivers side header off my old 74 Duster once upon a time, and tried to get one like above to fit......and it won't on an A-body. Miguel (Migsbig) is an honest seller and good guy....and may not have known there was a difference on the drivers side. :prayer: