[Tom Goldman]

Larry, If your ladder bar set up allows the housing to rotate and seperate the chassis in the rear, it's likely it likes the added pinion angle because the chassis stays seperated long enough to benefit from the increased angle.
To prove this out ,you will need to anylize a good slo mo video of the back of your car to see if it stays seperated to say,maby the 60' mark.
Once you can see that ,you can jack the rear of the chassis to similuate the chassis lift and remeasure your driveline angle.
You will probably find it has decreased from your static measurement.
if the change is large enough, it's possible that it could go to a negative angle if the starting angle is 1-11/2 deg.