Going to install 340 stripes on my 73 first time any advice..

I got a couple days off coming and I an going to try to install the stripe kit on my 73 340..
So I know the car needs to be clean and free of wax etc.. I also know to load up a soap water mix on the car and stripe..
I dont know the exact measurements but I figure I will tape a picture to the window.

Any advice would be greatly appreciated...