  A local and renormalizable version of a modified PQCD introduced in previous
works is presented. The construction indicates that it could be equivalent to
massless QCD. The case in which only quark condensate effects are retained is
discussed in more detail. Then, the appearing auxiliary fermion fields can be
integrated leading to a theory with the action of massless QCD, to which one
local and gauge invariant Lagrangian term for each quark flavour is added.
These terms are defined by two gluon and two quark fields, in a form curiously
not harming power counting renormalizability. The gluon self-energy is
evaluated in second order in the gauge coupling and all orders in the new quark
couplings, and the result became transversal as required by the gauge
invariance. The vacuum energy was calculated in the two loop approximation and
also became gauge parameter independent. The possibilities that higher loop
contributions to the vacuum energy allow the generation of a quark mass
hierarchy as a flavour symmetry breaking effect are discussed. However, the
decision on this issue needs the evaluation of more than two loop
contributions, in which more than one type of quark loops start appearing,
possibly leading to interference effects in the vacuum energy.
