Bottom line, there are too many variables for any one method to be the absolute correct answer or even possible. Cars are lowered, rears are located at different heights, engine/trans assemblies are all over the place, up, down, angled forward, backward, the distance between u-joints can vary a great deal, etc., etc. Now if you build a car ground up, you can achieve a perfect configuration. Anything else is a "do the best you can with what you got" situation 90% of the time. Keeping the operating angles of the front and rear joints as close to equal as possible is important. The only rule that needs to always be observed in a drag car is that the correct pinion angle has to be maintained and never be allowed to go positive. That's my final answer for the million dollars.