A good man to talk with is Frank Bowers in Wister,Oklahoma. Frank has both a Cougar and a Mustang with 427 Tunnel Port engines that he and his wife drive regularly on the street. He says they are no problem at all. Frank is the Cougar Eliminator Registrar for the Cougar Club and can be Emailed at:
bowers@clink.com A hell of a nice guy to talk with. Later, David Shelton (Looking for a 427 SO MR)