  V510 Pup (IRAS 08005-2356) is a binary post-AGB system with a fast molecular
outflow that has been noted for its puzzling mixture of carbon- and oxygen-rich
features in the optical and infrared. To explore this chemical dichotomy and
relate it to the kinematics of the source, we present an ACA spectral line
survey detailing fourteen newly detected molecules in this pre-planetary
nebula. The simultaneous presence of CN/C2H/HC3N and SO/SO2 support the
previous conclusion of mixed chemistry, and their line profiles indicate that
the C- and O-rich material trace distinct velocity structures in the outflow.
This evidence suggests that V510 Pup could harbor a dense O-rich central waist
from an earlier stage of evolution, which persisted after a fast C-rich
molecular outflow formed. By studying the gas phase composition of this unique
source, we aim to reveal new insights into the interplay between dynamics and
chemistry in rapidly evolving post-AGB systems.
