Larger gearbox tunnel that can be fabricated to run with original centre tunnel.

Larger fabricated one piece tunnel that runs at a very similar height at back to allow for attachment to original tunnel, as you can see the tunnel is square so some fabrication is required to join these together, gear lever turret is also available

around 700 long, 280 wide at front and 160 at rear at top, bottom is wider but can be pushed in, around 280 high at front and 150 at rear