Dang! Can't answer you question, but what a nice organized garage! Wish mine looked like that.
CoolCat33, Lowering blocks should not change your pinion angle, lowering springs will raise the pinion some. However the stiffness of the springs would be a player too. The PROBLEM part always is the relationship between the angles between the engine/ transmission angle and the pinion angle and how much the pinion angle changes with spring wrap at speed. Suggest you measure these angles with the suspension loaded before you make any changes. Once you change either the springs or add blocks or both, re -evaluate the situation, everything in the rear will be fresh and you could easily add some pinion shims to correct the pinion angle if necessary. a lot depends too on how you drive the car. Boilermaster
CoolCat33,In theory what you want is the pinion angle to match the trans yoke angle within 1 or 2 degrees. If not you then change the pinion angle with shims to be close to the trans yoke angle. Also important is the angle between the drive shaft and the pinion which is measured from the pinion angle and driveshaft angle. Here is a good article about the topic:
www.hotrod.com/articles/91758/amp/
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