Greg, that diagram is great for a 4x4 but it simply won't work in this application with 4 degrees of driveline angle. The drivshaft slopes up in that scenario which means you add the working angles, NOT subtract. I tried the 4 degree driveline angle with a pinion angle of 2 degrees and it vibrated like hell.
Rich,
I'm saying to have a 2-3 degree driveline angle and say 1-2 degrees up or pinion anlge. (Within 1 degree for smooth runout) It's whatever get's your working angles in compliance at RIDE HEIGHT.
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Todd
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