Thank you Peter.
Willys wheels are Slotdevil aluminium wheels.
8mm wide at the back and 4mm in front with Nomad inserts.
I had to remove some aluminium from the center of the 4mm wheel to get insert in place.
I was sure that I have to go with independent front wheels in order to make room for the guide
but when I got the front wheels in place I realised that there is just enough room under the front axle for the guide.
Cheers
Aki