Yes, you probably need to switch from a S-corp to a C-corp (for the reasons the other answer already addressed). But whether you need to switch from Kentucky to Delaware is a separate question--depends upon the type of investors you're going after (and their end game).

However, you probably wouldn't want to dissolve the Kentucky company and set up a new company in Delaware--that would have too many tax consequences for you. What you'd do is a merger, where you are merging your current Kentucky company into one you create in Delaware. That's not a DIY proposition--you'll want to a work with an attorney & a CPA who are experienced in mergers.