Shifter Hole size Question?

I am Getting ready to put in the hump for the 4 -speed on my 70 Barracuda Gran Coupe. My question to the pros on here is ....is there a template for the hole size under the hump ,( where the hurst pokes through ) any where or should I just line up the tranny / shifter position and Make a hole!! I would like to do it properly and factory appearing , a good photo of the hole location on a rotisserie mounted car or a factory drawing if anyone has it would help, This is my first project and I don't want to massacre anything.
Author: GranCuda70