High speed stability questions.

Think 150mph for one hour.

Has anyone experimented with improving the high stability of a 67-69 Barracuda. I’m talking cleaning up the under car air flow. I was thinking a front splitter, rear diffuser, installing panels to smooth air flow. Anything cosmetically obvious would be unacceptable for me.

Good page on splitter theory. The page is for a BMW E30 M3 (a car I had for 4 years and just sold) but the info works on all cars.

http://www.e30m3performance.com/myths/splitter/splitter.htm