David: Yes. That is a very, very early Shelby AC badge for the first run of 289's. Shelby quickly ditched the "AC" in the logo and went with the early Cobra logo. All CSX 427's had the Cobra logo.
Stan: Yeah. Your right I can't tell the difference between that COB and my car or any CSX. New or old. They all are identical!
No, a CSX built between 1962-1968 minus the "CSX" (assuming you are grinding it off) leaves you with a Shelby Cobra with the "CSX" vin # ground off.

This car was primarily fabricated by AC.
A CSX built between1997 to present minus the "CSX" (assuming you are grinding it off) leaves you with a Shelby Cobra with the "CSX" vin # ground off.

This car was primarily fabricated by Kirkham.
Further, might I add that CSX, COB and COX were all specific and separately used prefixes. A CSX car did not also have a COB prefix. So grinding off a "CSX" (signifying a car built for Shelby) prefix would not leave you with a COB (signifying a car built for Britain). Stan. You know better. Sheesh!
You make this too easy.
