See: https://www.smithsonianmag.com/arts-culture/beer-recipe-came-hops-grown-smithsonian-180974975/
While I don't question Charlie's use of Pilsner as a base, I really detest that malt. So I'll likely use American Pale Ale, or Golden Promise instead.
Unfortunately, his recipe in that link is not precise on the yeast strain. (or even if it is an Ale or Lager) The style can be made with either. My guess based on the fermentation temp is he brews this as a lager but could be a cold fermented ale. But his FistBump yeast seems to be a hybrid, so it might not matter. (a.k.a. WLP862 CryHavoc)
The calc shows the color way lighter (like an amber or brown) than a porter.
Hallertau can be subbed with Tettnang or Spalt. Bullion can be subbed for the Cluster. (the point is to use a very low aa% home grown or heirloom hop)
I'll brew this as-is (even with Pilsner) one time, but then likely start adjusting to hit style and to my taste buds.
It seems that link has a different version. Here's one printed from Zymurgy: https://www.homebrewersassociation.org/homebrew-recipe/flubadub-all-grain/