I just put Corona arms in a stock sprinter and came out with 1.5deg neg camber. Not nearly as much as that photo shows.
But my first point should be GET A PROPER WHEEL ALIGNMENT. The single best thing you can do to improve the handling of a car after changing any steering/suspension bits.
Also I believe RA40 struts don't screw with camber, only *A6* (and XT130) struts do that.
Hen