Vibration right off idle

I have the car on ramps and it's level, so good there. Sorry, but are you saying keep both the pinion and the trans at 2-2.5*? And is that in both directions?
Set the trans so it is pointing up +2.5 degrees
Set the rearend pinion so it is down -2.5 degrees
Negitive or positive 2 to 2.5 is just a range to shot for.