[Cait]

     I was wondering if someone could give me some guidance as to how benzene could be converted to naphthalene though an EAS reaction? I know that I can react benzene with succinic anhydride and AlCl₃. I can then add SOCl₂ and AlCl₃ for an acylation reaction.

   These steps would add a second ring with two ketone functional groups to the benzene ring. However, I'm not sure how to create the pi bonds in the second ring. Could 2 mols of NaBH₄ be used to convert the two ketones to secondary alcohols and then remove the alcohol groups through dehydration?
   Or could you use Zn(Hg) & HCl to remove the ketone functional groups, add two mols of NBS and then create the double bonds through elimination? Is there another method I missed?

[SDVENHI]

Your approach looks reasonable.  I have seen an anthraquinone reduced to an anthracene with borohydride in refluxing isopropanol.  It is not a big stretch to assume that these conditions would work to convert naphthoquinone into naphthalene.