Stroker advice

I've never seen anybody build an engine around a cam, but that doesn't mean it can't be done...
What I don't get is why which 390 kit, they all make 390 cid, that's why I asked him below comment.

Do you mean in compression and valve clearance and or strength ?


Im just wondering what 390 stroker kit is best for my 318 with this cam setup.
His above question is weird, what is he really asking?