Pinion Angle? Do I have this right before I cut it up?

If you are going to level the car or raise the car up to check the angles remember that the suspension needs to be loaded in the position it is at ride height ( weight of car on the tires). Like on a "drive on" type hoist, car ramps, blocks under the wheels or jack stands under the rear axle. Ideally the weight of the car would be on the front tires also. If you use jackstands under the frame in front place them as close (front to rear ) to the front tires as possible. This will keep the rear suspension close to ride height. Be safe. If you position the car so that the engine/ transmission centerline is level the math is easier as your actual pinion angle reading will be relative to the crankshaft. Hope this is helpful in confusing people even more and if you weren't confused before hopefully you are now. lol