Well,well now you have it.Setting up off the trans tailshaft as discribed is correct for setting working angles of the u-joints.Once you establish the working angles(both u-joints opperating with in their working range in a parallel or near paralell plane,them you can set your pinion angle for your type of suspension.You new wave experts and book buddys need to understand what you're talking about.We old timers allready have figured for the working range during the chassis build or suspension modification.That's second nature for us.Assuming that your build and modification had allowed for this,then set the pinion angle off the driveshaft is the acceptable method.And as stated many times your basic mopar engine and trans is a fix position,your not likely to change it,and anyone that does change it or the suspension (should) have the basic knowledge of working range of u-joints.With that being said the youngsters and book buddys are also in their own way correct,they should have explaned their method as such(setting the working range of the u-joints correctly so that proper pinion angle can be achived.)My advice for them is to totally understand what they read and what picture they look at before claiming to be the altimate authority on the subject.We old dog geezers are always a step ahead of the pups.MERRY CHRISTMAS,HO<HO<HO
