What all do you have left of the buildsheet?
To answer your question somewhat the "S" designation was applied to 340 and 383 cars in '69. The 'Cuda package was a 4 speed trans, dual exhaust with chrome tips, a rallye suspension, the twin scoops, a blacked out grill and stripes with callout on the hood.
So possibly could have both badging, formula S 'Cuda.
Hope this helps, more will chyme in to help you.
Welcome to FABO.