lightest a-body??

1960-1962 Valiants and Lancers (aka "Toads") were advertised to have a curb weight of 2,570 lbs

http://en.wikipedia.org/wiki/Plymouth_Valiant

Edit - Oops - dyslexic - 2,750 lbs

Valiants are generally lighter than Darts due to having a shorter wheelbase