Surprised nobody has chimed in yet... You asked for opinions, so here's one, for whatever it is worth.
It would appear that at higher speed you don't get a lot of airflow through the A/C condenser - it is sort of a vacuum at higher speed. And of course, the oil cooler is really only necessary at these same higher speeds where it won't see airflow. I've read about several experiments with putting an oil cooler in various places of the Pantera, but have personally not read any where the owner was thrilled with the result.
Consider a oil-to-water oil cooler instead of an air-to-oil cooler. This has a couple of advantages. It will actually help your oil warm up quicker, which will help reduce wear. It can be mounted more or less anywhere, which keeps your oil lines short (less oil pressure loss, and less chance of rupturing an oil line). They have been proven to work in many oem applications. Thomas Tornblum in Sweden just installed one that he pulled out of a Ford Crown Vic. Dennis Antenucci is running a similar unit in his, and so far is very happy with the result.
The problem with a traditional air-to-oil cooler is where to put it where it will get enough airflow to make a difference. This problem is eliminated with a water-to-oil cooler. I'd do some research on them before going much further...