Enzo's Spaghetti all'Amatriciana
You can substitute salted pork for the guanciale, but make sure you pick salted pork that is more "meaty" than fatty. Cut away and discard the rind end of the salted pork. Since salted pork is very salty don't salt the pasta water and don't add any salt to the sauce.
Nutrition data for this recipe includes the full amount of rendered fat from cooking the guanciale. The actual amount of fat consumed will vary.