I have an 89 n/a, so I put a Carquest (made by Hayden) 12x5" out in front of radiator about 6" with some metal brackets for mounts. I did not want to put it on the radiator because it would transfer too much heat.
If mine was turbo, I'd definately put it after the intercooler, somewhere, as I would want the coolest air possible going into the engine.
I was thinking of making a mounting bracket for right behind the electric radiator fan. No matter where you put add-ons, you'll always be putting heat from one liquid to the cooler of another. So its always a problem of sorts.