Welcome to the Q&A Forum

Perhaps the bigger question is: why are you not segmenting your keywords for these pages?

I sounds like you do have duplicate tagging and are not utilizing the additional content to target additional terms. If you leverage the hierarchy of content, cross link, and tag appropriately you will avoid any negative affects.

Anther thing to look at as well, is the trailing slash on the URL. This is often overlooked and could cause even more duplicate content.

I have blocked the Wayback Machine for a client and not allowed them to index the site. I blocked them via the robots.txt and not Meta NoIndex, and while blocking Wayback Machine it did NOT impact the positions within the targeted Google results.

Hope this helps.