So...this was a trying skeletal reconstruction. Despite being known from several complete skeletons at several ontogenetic stages, they have not all been figured (or even well photographed). The monograph and most of the important papers are in Chinese (understandably) but just don't have as much photographic documentation as one would hope.

There are some wonderful tables of measurements though! This reconstruction is based primarily on T5402. The tail turns out to be a little shorter than previously portrayed. The presacral vertebrae are a bit distorted, but even accounting for taphonomy there's no way to force them into a Haplocanthosaurus-like arch as has previously be portrayed. Likewise, the cervicals do not form a gently upward arc, but instead retain the primitive weak S-shape of melanorosaurids.

http://scotthartman.deviantart.com/art/Shunosaurus-a-primitive-club-tailed-sauropod-582692198