OBJECTIVES: I. Determine whether the addition of methotrexate (MTX) or VBMF (vincristine/bleomycin/methotrexate/fluorouracil) to radiotherapy for advanced carcinoma of the head and neck (with or without primary surgery) influences locoregional control and prolongs survival. II. Determine whether an effect on locoregional control or survival is apparent when chemotherapy is given during or following radiotherapy and whether it is increased when chemotherapy is given at both times. III. Determine, in a special randomization of patients with cancer of the oral cavity or oropharynx, whether neck irradiation improves locoregional control and survival.