  We study exclusive B decays to final states containing a charmed baryon
within the pole model framework. Since the strong coupling for $\Lambda_b\bar B
N$ is larger than that for $\Sigma_b \bar BN$, the two-body charmful decay
$B^-\to\Sigma_c^0\bar p$ has a rate larger than $\bar B^0\to\Lambda_c^+\bar p$
as the former proceeds via the $\Lambda_b$ pole while the latter via the
$\Sigma_b$ pole. By the same token, the three-body decay $\bar
B^0\to\Sigma_c^{++}\bar p\pi^-$ receives less baryon-pole contribution than
$B^-\to\Lambda_c^+\bar p\pi^-$. However, because the important charmed-meson
pole diagrams contribute constructively to the former and destructively to the
latter, $\Sigma_c^{++}\bar p\pi^-$ has a rate slightly larger than
$\Lambda_c^+\bar p\pi^-$. It is found that one quarter of the $B^-\to
\Lambda_c^+\bar p\pi^-$ rate comes from the resonant contributions. We discuss
the decays $\bar B^0\to\Sigma_c^0\bar p\pi^+$ and $B^-\to\Sigma_c^0\bar p\pi^0$
and stress that they are not color suppressed even though they can only proceed
via an internal W emission.
