Pedal cluster is more in the car. Removed 27,5 cm from the tunnel to receive an wheelbase off 210 cm. Spotwelded the tunnel before total welding.
Next problem is the reversed position of the hadbrake level of the original car.
This is how the Beetle handbrake is in the chassis:

And this is the way the original car has it:

Need to rotate the handbrake level 180 degrees and have to make other cable channels and longer cables...
Just paint no Bondo!
Welded the end of the cross section at the bottom:

And also welded the tunnel:
Changed the handbrake level and spotwelded in the chassis:

It works! And now remake the cable channels in the chassis and replace the gearshifter in the tunnel.