For my own clarification (I've seen these discussions come up before), is the 3 degrees down in front relative to the earth or to something else on the car (e.g. the bottom of the frame rail)? Even on level ground, it seems like things like worn front springs, big tires in back, etc. would affect things. So if measuring the bottom of the frame rail shows the front end down 1 degree, would you shoot for the pan rail to be down in front 4 degrees from level?
I realize it sounds kind of absurd to get down to this detail, but if we're only talking a specification of 3 degrees, being off 1 degree would amount to 33%.
Pat