Aussie:
The GS was a "Factory Skunk Works" project thru and thru. Created at the beheast by Duntov himself. They were lent to teams (Davis (Gulf
Oil), John Mecum) as modified looking Stingrays.
The BB issue is all well and good and there are a lot of "what ifs" but the BIG BIG problem with the GS was their lack of high speed stability. When a car loses its status as a land based vehicle, it doesn't matter how much power you have.
The wind tunnel test on the "slippery" '63 designed Stingray proved to have more drag than the '62 quad light production Corvette.
Personally, I don't think the GS was ever a contender, especially if you match it up against the Daytonas. There is just no comparison. It would have gotten killed at Le Mans--not for lack of power--but staying on the track.
The Walton car sold (this is the buzz I get) for over $4,000,000 to a collector of exotic race prepped Corvettes. This collector also owns CSX 3002 and the Harr Ford 427 DragonSnake.