Pinion angle?

[340_833 dart]

I've been dealing with a minor driveline vibration ever since I swapped a 727 in place of the 833 four speed.
The U-joints are brand new, as is the transmission yoke, and I had the entire driveshaft balanced. That lessened the vibration but it is still there.
So, today I went to this web site; http://www.wolferacecraft.com/pinionangle.aspx for instructions.
The measurements on the pinion yoke and the driveshaft were identical.
Does that mean I need to get wedges to point the pinion down? Is the ideal down angle 4 degrees?

 

[Snake]

I like 3 down gives a nice bite and yes get the wedges,or re weld your perches.

 

[68dodge]

I run 5 degrees, make sure the car is sitting on the ground when you measure this.

 

[805moparkid]

I run 5 degrees, make sure the car is sitting on the ground when you measure this.

yea lay a long level on the ground with ur angle finder on top of it. find an area that is even where all 4 tires are. if it is 2 degrees off all the way around thats fine because u just subtract 2* from the pinion measurement