This is how I arrived at those measurements.

Using Illustrator I drew two horizontal lines 11.25" apart. (this is the distance from prop to LE of wing) The top represents the prop and the bottom line represents the LE of the wing.
The prop line is 42" long only because thats the length of the aluminum I'm using.


Then I select the top line (the prop) and apply a 2 degree rotation to it.

The left side of the line moves away from the LE and the right side moves towards the LE. The drawing in Illustrator is full size and I can take the measurements from it.

Looking at the engine it seems extreme to me and I dont want to drill until I'm sure.

I'll double check with a protractor and go 2 degrees off of a centerline running straight up the fuse..

steve