Well David, you can still drive the Cobra if you ever visit SW Wisconsin. Even though it isn't an import!
I took mine to a car show once and to the local pre-cars and coffee type get togethers a couple times years ago just because there were people there I knew. Everytime someone heard it run they asked what was under the hood. One time there was a guy with a Chevy 427 in his replica and the guys told him he needed work on his because it did not sound nearly as mean as mine did. Mine is nothing special with a little over 400hp/360cid but the custom headers must have somehow hit some sweet spot for sound. I am sure they could be better for performance, but there isn't really much room.