Chris, the things to keep in mind, the suspension needs to be loaded when using the inclination meter, it doesn't matter the rake/angle of the vehicle, as long as the dimensions you are taking are done completely front to rear along the driveline for that moment/set-up, and any changes are based on the current data taken, also your pinion rolls up 2-4 degrees during acceleration, and that your U joint angles should be 1-2 degrees deflection along the various planes measured for proper U joint rotation to avoid vibration/binding, you don't want a U joint with 0 degrees between planes, the pic below is what your driveline angles should look like UNDER acceleration, not a static set up, 0 or nose down is the preferred angle for the pinion, but a lot of factors will determine where the driveline angle needs to be

Mike