Forgive me, but I’d like to roast an old chestnut.
What this boils down to is that you see Jefferies' intent, rather than what is seen on-screen, as your own personal canon. More power to you. Similarly, I prefer his swollen secondary hull designs to what was actually built for TOS, myself.
But there is no ultimate answer for you, just multiple questions. We know what the hull number is, we've seen on-screen what the hull number is . . . what more do you need? If we go back to "creator's intent," Spock will have a plate in his belly by which he ingests engergy, per Roddenberry's first outline.