  An extension of the Lorentz group that includes generators $\Gamma^\mu$
carrying a space-time index has been previously demonstrated to
\emph{explicitly} construct the Minkowski metric \emph{within} the internal
group space as a consequence of the non-vanishing commutation relations between
those generators. Fields that transform under representations of this extended
group can fundamentally incorporate microscopic causality as a crucial property
of physical fields. The first part of this exploration focused on the
fundamental representation fermions (which satisfy the Dirac equation), and
explored additional internal symmetries associated with those fermions. Any
interactions that could result from those symmetries were demonstrated to
necessarily be consistent with gravitational equivalence under curvilinear
extensions of the (abelian) space-time translations.
  The first boson representation of this algebra is the focus of this second
paper. In particular, the equations of motion for a group of massive vector
bosons are degenerate with that of massless vector bosons, allowing them to
unitarily mix to form physical states with differing masses and dynamics. Thus,
this representation exhibits a potential for enhancing insights into the
standard modeling of electro-weak mixing of bosons. The various spinors that
represent these bosons exhibit kinematic factors, and those factors are related
during unitary mixing to generate the resultant physical states. For this
reason, analytic and kinematic coincidences associated with known electro-weak
masses will be explored for insights into possible predictive relationships
between their masses and those of this first causal boson representation. To
conclude, a plausible model will be constructed using examined coincidences for
critique and insights into the potential viability of the approach.
