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Transmission Installation Transmission Tunnel

To figure out where to cut the transmission tunnel for the shifter, we attached the bellhousing to the engine, then raised the transmission into place. After marking the spot where the shift lever touched the tunnel, we drilled a small hole through to the interior so we could tell the center point of where the opening needed to be.
Five Speed Manual Transmission Installation - Shifting Gears

To figure out where to cut the transmission tunnel for the shifter, we attached the bellhousing to the engine, then raised the transmission into place. After marking the spot where the shift lever touched the tunnel, we drilled a small hole through to the interior so we could tell the center point of where the opening needed to be.  View Related Article