That's a good general cross section of the rockers. At the A pillar there's an additional member between the inner and middle.
Removing the gearbox is tricky for two reasons, if you have standing pedals and floor shift. The short clutch arm has to be removed, that means removal of the nut and knocking out the cross pin. The other thing are the ears on the bellhousing left over from a column shift cars that get in the way of pulling the trans back far enough to clear the clutch. 30 years ago I carefully trimmed the bellhousing and covered the holes with aluminium tape.
I'll put some pictures up.
64 TI (the violin), 87 911 Carrera coupe, 89 Peugeot 505 Turbo Wagon sleeper