We allow for the Cobra dress up kit (which the valve covers are part of) without a points deduction for correctness. However, the rule is very specific: 289-302 only, closed letter valve covers with correct chrome bolts, 14-inch chrome air cleaner, chrome dipstick, and chrome oil cap. (radiator cap and non-disc brake master cylinder cap may be chrome).
Keep in mind this was a dealer/over-the-counter option only...not from the factory assembly.
Regards,
Pete Morgan