[Mr70]

Festus is right.
It was an early assembly computing error.
Technically,in order to get the new 1970 454 Chevelle/Elcamino,you first had to order the Z-25 396 package,then the Z-15 454 package was added to it.
The B-22 "SS" Door emblems were automatically included with the Z-25 package,and should have been carried over to the 454 option,but it wasn't so in the beginning.
Early in production,all the other Super Sport provisionals followed along with the Chevelle/Elcamino 454,except the door panel callout,from what I have seen.All 6 United States Chevelle Assembly Plants amended this by adding them to the door panels at the trim shop later on,and even to some NON SS cars..even though their paperwork didn't call this out.Chevrolet released a TSB alerting them to do this also.
Canada's Oshawa plant was on the ball and carried over the B-22 addition from the get go on their LS-5's paperwork.(No LS-6's were produced at Oshawa)
It should be noted that in my research that I have only seen two against the norm documented Baltimore Built LS-6's with the B-22 callout on their buildsheets.Both were later production,and both built before and after other cars without them.
Ironically the 1970 Monte Carlo 454 Z-20 Super Sport option reflected the B-22 "SS" door emblem at the very same plants the Chevelle 454 Super Sports were assembled without them.
Beginning in 1971 & 72,ALL Super Sports,be it 454,402 or 350 cid's had their orders corrected to reflect B-22 "SS" door emblems.