Thundarr, who made the original suggestion to make this dummy filler neck work with an AC power outlet, posted a photo of it in his build thread. Thank you, Thundarr!
https://67-72chevytrucks.com/vboard/...70#post9050170
By the way, in this next batch, I am going to use standard pan-head screws instead of flat-head screws on the regular non-power-outlet version. For those of you who plan on attaching a power outlet, you will need to let me know so I can machine the countersinks for flat-head screws for you.