340 manifolds with a twist (literally)

I have a set of 340 exhaust manifolds to sell. They are PN 2883549 and 2883553. The twist is that the driver side manifold has been modified as follows: A wedge of manifold just above the collector flange was cut out, rotated 180 degrees and rewelded. Now the collector flange faces down and back rather than down and forward. They were then magna-fluxed and examined with ultrasound to check for any defects, then jet hot coated in a "cast" color.
I have checked with several FABO members whose opinion I value and I am asking $500 plus shipping from 80232.