Another 2 piece driveshaft angle question

[Koz1]

Here are current angles on mildly static lowered 1991 suburban

tailshaft angle -2.6 slope down towards center support bearing

1 shaft angle -3.6 slope down towards center support bearing

2nd shaft -1.3 slope down towards center support bearing

pinion angle -4.8 slope down to ground

all angles as posted have a - slope. Do these fall within range, there's a very minor vibration at 45-85, brand new wheels and tires, even before with the old stock factory wheels,had same slight vibration.
Also those listed angle above are very close to the before lowering of the vehicle at factory height.,lastly vehicle has 64k original,and i've serviced since new.