A real long hood may be lighter, but these backdates will be much stiffer (in my experience)
These backdates are really interesting
Get close to a Singer without the $180K
But I guess backdates with real steel fenders like this one will become rare. Can't find rust free fenders any longer.
Some other nice examples ( unfortunately sold):
http://forums.pelicanparts.com/porsche-cars-sale/498756-backdated-carrera.html
http://forums.pelicanparts.com/porsche-cars-sale/442243-fs-backdated-911sc-rs-spec-3-4l-connecticut.html