Fate Stay Night & Harry Potter Crossover-Challenge

What if Shirou Emiya was Harry Potter before the Fuyuki Fire? Takes place during 1990s.

What if everyone is 3 years older (just to have Shirou 17 after Fate Stay Night Unlimited Blade Works *Harry is 14 years old, having Shirou mature seems like the best option). How would Dumbledore react to a being such as Shirou Kotomine Emiya (Just assume Shirou Kotomine is Shirou Emiya). What would the Clock Tower (Mage Association) do to The Ministry Of Magic?

*PM if u accepts challenge.