Maybe it ought to be SVA'd as a new vehicle but where do you draw the line between restoration & new build? We're replacing like for like, old panels for identical new panels. It's still a 1969 car as far as we're concerned but 90% of the body panels will be brand new. The rest will be from half a dozen different donor cars, plus a little bit of the original.
That reminds me of when on Only Fools And Horses, Trigger said "I have had this broom for years!.......It's only had 4 new heads and 3 new handles"
Still, I'd say that it shouldn't be SVA'd because it has the origional chassis and chassis number, just because the rest of it is new or replacement, that's just cosmetic to ensure that it is road worthy and leagal and MOT passable! plus the added fact that if you did SVA it as a new vehicle it would be a 2009/2010 charger and not a 1969.
Thats my 2p's worth any way.