Another pinion angle ?

I just read through my "new" Chassis book and have concluded that on that subject, whoever wrote that totally screwed up. They barely mention the crank/ transmission centerline, which is what it's all about. The best way to deal with pinion is to take the driveshaft out and set it aside. Measure the crank/ transmission centerline and use THAT as your reference. If the transmission needs to be changed in relation to the car "level" then change it and measure the centerline again. That shaft and the pinion is all that driveshaft "knows" and the the trans and pinion need to be parallel under full power. "Exactly inline" in other words the three of them forming a straight line is not good either

The whole reason you are pointing it down is so that when the power comes on the thing rotates up under power, and "comes into" parallel