Mopar 340 HI-PO exhaust manifolds (68-70)

FYI I worked at mopar in the 70's and I can tell you easily after stocking several hundred of them.... entire shipments came without numbers cast. They came with metal tags wired to the the middle two bolt holes...... needless to say, the tags were removed for installation.... they did however have an unusual designation/description: they were designated as "factory replacements" and were collected from both initial vendors and the assy plants, not used in assy but used if an assy part failed before loading (rare)... the remaining manifolds were "collected" and shipped to Centerline National Parts depot, reserve/inactive storage....
The possibility exists that they are indeed valid Mopar parts