Just from the drawings it looks like you remove the belt and get after it. Maybe 3 hours? Looks like you would want to do it on a lift or pull the radiator.
Technically the fuel rail should be replaced once removed. Some owners have reported they just unscrewed the line with 3/4 inch wrench and moved out of the way.
Well I talked to a shop and they said it was a ten hr job at about $100 per her. I studied some looking at it and it does look like that bad of a job. I will let y’all know how it goes.