Cabin Temp

You're not going fast enough, or you have a big airdam on your car. Virtually all the air going into the radiator and under the front exhausts into the low pressure area behind the window, after sweeping up past the engine. But if you're feeling experimental, the Porsche 914 had a small strip-spoiler under the car, just at the firewall, that was supposed to swirl air across the bottom of the engine (sealed engine compartment)for cooling. Try it and see if it does anything for you..

Thanks for the info Bosswrench! But to be honest with you it will happen at any speed. I removed the rear quarter windows and that seemed to help a bit but the rear window will get quite warm after a while even at 80 mph or so. I've experimented cruising at different speeds (from 50 - 100 mph) and it really didn't make any significnat difference. I'll let you know if I find something that works.
Raja