Hose Trans cooler on 1967 Avanti II

[Dick M]

Last fall I purchased a 1967 Avanti II.  I had to replace the air intake heater core control cable (bowden cable).  In the process of routing the cable above the AC evaporator, I noticed that the "Hose trans cooler" on the passenger side had corroded and deteriorated to the point that it really was totally gone (just pieces).  I looked at the parts catalog, and found the attached graphic (shown as 2138-65) .  It really does not indicate where it connects at the top of the dash.  Before I dig deeper into the dash and console, I have several questions.  Where does it get the 'fresh air' from?  Are there any better pictures or drawings showing the connections?  I know it says it is a trans cooler hose, but is it just a convective air flow cooling system?  What are the consequences/risks of not replacing the hoses (left and right)?  If anyone has replaced these, any advice on the process would be appreciated.  By the way, it has a GM 3 speed automatic transmission.

Edited 12 hours ago by Dick M

[Gunslinger]

It draws in outside air from the cowl of the car.  If you look outside at the base of the windshield through the intake grating you'll see two intakes under the square covers.