Traxler Counterattack

One of the sharpest lines out there (imo)... it is typically extremely effective against the Knight Attack (which is really common in Blitz) when 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 is played. However, in order for me to be successful in this counterattack, I need to know how to play out each line when white responds to 5... Bxf2+ with 6. Kf1, 6. Kxf2 and 6. Ke2 as well as variations for each line. There aren't many games in chess.com's opening book with these lines and the Stockfish engine honestly doesn't really know what it is doing (it always thinks White is winning even though masters have concluded that it is even). Could someone help me out with some of these lines?

See the books "The Alterman Gambit Guide Black Gambits 2" by Alterman and "The Real American Wilkes-Barre Variation" by Williams.