U-joint working angles are 1/2 to 3 degrees, more or less under ideal conditions. Thats tail shaft to driveshaft, and driveshaft to pinion gear. As long as the oil pickup is still under oil, and the u-joints are happy, it will work. Setting level doesn't mean much when roads have hills and turns, means even less with fuel injection, just look at how some boat motors are mounted !
