With carb pad level, I have 3° angled down off my front machined surface on the block. Being that trans is machined to be exactly in line with block, then the end of the output shaft should be at 3° down as well. The only other bogey is the rear axle. Ford explorer 8.8. I will set this at -2° or essentially 2° pinion down from zero with all the weight in the car.