C- notch install help?

[bmfpeterson]

I have my frame on stands and I'm ready to do my notch. I looked on this site and found this real helpful how to with the same cpp notch but I have a couple questions.

http://67-72chevytrucks.com/vboard/s...d.php?t=195566

in this how to it shows to line up the notch with the oval hole and not with the directions.

My question is.. I want to measure for the rear end to make sure that the notch is center with the axel at full drop, but I have nothing but a frame and I cant line up the axel with the notch....

In this how to he says he measured 5 frames in his shop and they all measured out the same I just want to make sure being that I won't have the rear suspension to check....

Any help is greatly appreciated!