Vettehead Mikey:
I think the tank sticker is extremely relevant and important to EVERY Corvette.
The engine is just one piece of the puzzle.
Did the car actually come with the amfm, or did you change it from amfm stereo?
Was the hardtop actually factory and did it come through with Vinyl from the factory or was that done to increase value without documentation for proof?
Did it come with blackwall, lettered, or whitewall tires from the factory?
Etc.
You make it sound like if you know the engine, there's nothing left to know.
I say the tank sticker is relevant for every Corvette even when you know the engine and it doesn't have to be to prove a rare option.
Chuck