  The ability to transport quantum information across some distance can
facilitate the design and operation of a quantum processor. One-dimensional
spin chains provide a compact platform to realize scalable spin transport for a
solid-state quantum computer. Here, we model odd-sized donor chains in silicon
under a range of experimental non-idealities, including variability of donor
position within the chain. We show that the tolerance against donor placement
inaccuracies is greatly improved by operating the spin chain in a mode where
the electrons are confined at the Si-SiO$_2$ interface. We then estimate the
required timescales and exchange couplings, and the level of noise that can be
tolerated to achieve high fidelity transport. We also propose a protocol to
calibrate and initialize the chain, thereby providing a complete guideline for
realizing a functional donor chain and utilizing it for spin transport.
