If you have access to the latest Panorama magazine, they have a great article about a 1957 356A Carrera GT Coupe, original condition, with it's original Type 547 4 cam engine to boot. Crusty, crappy and just perfect!
110 hp @ 6400 rpm from the factory according to the article.
120 hours to assemble by an experienced tech. With timing taking as much as 8 hours.