Installing A/C system with overheating problems when car at idle!

[jalexquijano]

I am about to carry out the installation of an A/C system which includes the following parts to my 1972 240z:

http://www.summitracing.com/int/parts/vta-66005-vuz-a/overview/

http://www.summitracing.com/int/parts/vta-04808-vua/overview/

The problem i have is that down here in Panama, Central America the temperature is 32 degrees Celsius and lot of heat arises from the pavement. The other day while stuck in traffic bumper to bumper the temperature in the gauge raised to 3/4 and the car tended to stall lowering the revolutions to 800 rpm. Once out of the traffic at open road the temperature lowered to half. The queries i have are the following:

1) Should i purchase a fan shroud in addition to the air conditioner parts required for the installation to lower the temperature at idle under this heat conditions?

2) Will there be space enough to fit this fan shroud considering the car carries a New 3 row Aluminum Race Radiator and i still have to fit the condenser, dryer and condenser fan to install the AC?

[Kurbycar32]

A typical AC conversion on any car involves a different radiator, fan shroud and sometimes a different fan. I have an early 260z which I believe has the same size radiator as your car and started moving a factory AC system over from a 280z. I didnt want to store the AC condensor and risk damage so i mounted it on the front of the car in the factory location. Even without the condenser being active and creating heat it was enough to cause overheating, so I can pretty much guarantee your car will overheat if you dont pay attention to the cooling system. I plan on using a larger high quality radiator and possibly switch out to electric fans, which I anticipate will require an alternator upgrade. Your parts list doesn't include a condenser which is absolutely required.

This is a pretty good overview on how AC works:

HowStuffWorks "How Automotive Air Conditioning Works"

and heres a nice graphic that also details where these parts go on the car: