Jim ,
This original box used part "problem" is becoming more and more of a problem. "Treasure hunters" find old boxes and not knowing what they are go to the internet to see what they have . The information pops up and occasionally an auction site link . The seller bases his price off of the internet or auction site without any knowledge of the part or it's condition/function ( as I'm sure you are referring to) We had the same situation with EVERY C5AE-E 289 block being sold as a HiPo because "I read in a book" HiPo blocks were that casting #. At least 50% of the Ford/Autolite "boxed" stuff I look at has used parts inside , often not even Ford. I think "some " do it on purpose , "Pookie style". He must have a relative out here.
Randy