I would guess the latest versions of drawings were all digital anyway - the historical stuff would have been a shame to loose if just not from the historical perspective

I also could believe that copies of those last (maybe not current) set of files made their way in to interested parties hands for undefined purpose

Being the market is so small for the Gen2 Hemi - I am guessing it will be awhile before we see anything - especially with the corporate focus on the Gen3 stuff