Tunnels from other Datsuns.
Generally speaking, 63-series 5-speed and Automatic Transmission use the same tunnel.
B210 Late 67300-H7400 DASH-LOWER A12+14.F4,AT also Van.7510- 67300-H7900 DASH-LOWER A14.F5 67300-H7900 DASH-LOWER L16
74300-H7401 FLOOR-FRONT F4 74300-H7421 FLOOR-FRONT AT+F5 74300-H7800 FLOOR-FRONT V.7510-
B210 Early
67300-H5000 PANEL ASS'Y-dash lower 67300-H5001 PANEL ASS'Y-dash lower (from '74-9) 74300-H5000 FLOOR ASS'Y-front M 74300-H5020 FLOOR ASS'Y-front A
B210 USA
67300-H7700 ASSY-PANEL, DASH LOWER COUPE 0877- 67300-H7301 ASSY-PANEL, DASH LOWER COUPE 0875-0777 67300-H7300 ASSY-PANEL, DASH LOWER COUPE 0974- 67300-H6100 ASSY-PANEL, DASH LOWER COUPE -0874
74300-H7401 ASSY-FLOOR,FRONT COUPE (MANUAL) 0875- 74300-H7200 ASSY-FLOOR,FRONT COUPE (MANUAL) 0974-0775 74300-H7300 ASSY-FLOOR,FRONT COUPE (MANUAL)CAL. 0974-0775 74300-H5000 ASSY-FLOOR,FRONT COUPE (MANUAL) -0874 74300-H7421 ASSY-FLOOR,FRONT COUPE (5-SPEEED) 0476- 74300-H7421 ASSY-FLOOR,FRONT COUPE (AUTO) 0875- 74300-H7220 ASSY-FLOOR,FRONT COUPE (AUTO) 0974-0775 74300-H7320 ASSY-FLOOR,FRONT COUPE (AUTO)CAL 0974-0775 74300-H5020 ASSY-FLOOR,FRONT COUPE (AUTO) -0874