Yea the tunnels huge!! But if you look at the pics with the engine in you will see how far back it sits.
The tunnel houses half the engine as well.
The seats and pedals fit a treat! Using standard RS scheel seats, on standard runners but had to loose the door bins!!
The pedals are close, but i have modified and strengthened em to fit from a capri. If you have ever sat in a saxo, look at the pedals, there is more room between in my old nail!