If you check the link I posted, you can see the scans I mentioned.
A few of us have dug way into the parts books including different revisions & superceded numbers.
The first part number that shows up for a 340 hood emblem on the Challengers is for the 1971 model year.
No part number at all shows up for the 340 hood stickers mentioned in the other thread at all.
If anyone has anything that mentions a part number for either one for the 1970 model year in a factory book or document, believe me, I would love to see it.