Roadrunner,
Are there not any threaded adjusters on the rear of your ladder bars? I do not know of any that can not be adjusted some for pinion angle adjusting?
Before you fight with adjusting the angles, just what is your current pinion angle in relation to you driveshaft angle? Does the driveshaft angle up as it goes forward from the rear yoke and U-joints?
Also do you have leaf springs or something different?
Ed