That stocker is Rettig Bros/Steve Wann's '69 B'cuda SS/HA with the 383 and C/SA with the 440; a nine second car with either combination...nice FAST little wedge(s)!

BTW, here's another 383 in Don Little's super stock Challenger...this IS quick!

http://www.youtube.com/watch?v=pNVm7S-7hE0