How would you manage a imaging suspicious undissected (ipsilateral) lymph node in the setting of post-op RT for an oral cavity cancer with extensive nodal disease and ECE?

How would you manage a clinically suspicious (CT/PET) but undissected (ie., level V or paratracheal) lymph node in the setting of post-op RT for an oral cavity cancer with extensive nodal disease and ECE? Would you treat to pre-op gross disease doses (ie., 70 Gy/35 fractions), or 63-66 Gy and keep typical post-op fractionation?