Heater delete is noted on 1970 Hamtramck broadcast sheets.

A special order engine for 1970 would be on the fender tag & broadcast sheet as the 5th VIN digit of Z.

For 1969 Lynch Road A12 cars, the special order engine, transmission & rear end were all noted with 9 codes.

Special order interiors for 1970 were 9999.

Special order tires for 1970 were T99

I am sure there are other examples.

I have not seen mirror delete codes on any E-bodies either.