[VAC] Air Conditioner Installation Question

[Alexkensington@xxxxxxx]

Hell Folks-

I am getting ready to install an Air Conditioner on my 1966 22' Safari. About 
two years ago, I had the interior skin down and found the factory placed 
wire, as described, and I installed a condensate line through the walls. Then 
I buttoned the whole business up without marking anything! I plan on a 
through the roof installation as I don't want to lose a vent, and need the 
following information which was posted here a while back:

How far back from the first rib do you install an Air Conditioner on a 1966 
Safari?
I believe it was like 122" but I'd feel better knowing for certain. 

Thanks in Advance 
Alex in hot and humid Indiana
66 Safari