[Vegas69]

Your driveshaft and driveline/pinion are on different planes with a driveshaft sloping up. Compare it to bending your arm at your elbow.

With a driveshaft sloping down, it's on the same plane as the pinion and driveline.

For instance:

Driveline angle/Pinion Angle of 4.2 degrees
Driveshaft slopes up 1.6 degrees
Your current front working angle is 5.8 degrees
Exaggerated example /\

Ideal:
Driveline/pinion at 3 degrees
Driveshaft slopes down 1 degrees
Your working angle is 2 degrees
//

With a working angle of 5.8, you are in jacked up 4x4 territory. I doubt the car will be happy at high speed. All my research calls for less than 3 degrees of working angle for high speed. 1-2 degrees is really ideal. You will need to chop your tunnel or compromise on working angles by running non conventional angles.