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Ant,
The driveshaft "U" joints need some offset but no angularity for the needle bearings to work correctly.
The Ford half shafts use a tripod joint on the inboard end and a CV on the outer. All of the plunge is seen by the tripod joint.
There are two schools of thought about the correct setup. One being that the halfshaft should be level at max acceleration or Two that they need some angle to keeping from brinelling the race due to the high loads under max acceleration.
I feel that it best to just split the max angularity that the unit will see in service.
I try to put in about 1>2 degrees at steady state to allow the unit to have some plunge which increases the area that the bearings see on the race.
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