A numbers matching collector won't like the color change and updates. A "resto-mod" buyer won't like the 6 cyl and lack of 8 3/4 rear end. Its sort of in between markets. Converting to a modern hemi would be significant $$$ you might not recoup. Making it a 360 would certainly be cheaper. But no guarantee the time and money spent would bring you the additional investment at time of sale. It might make a little sense to be patient and cross your fingers the market doesn't dip, or drop the price a bit to make up for not spending any more time and money on it.