Thanks for the information dfx, anyway i would like to see a real photo of one F104 with this extension kit mounted at the front using F103 tires and F104 front arms, just to know the right height for the steering blocks.
My idea is to use these longer axles to obtain 190 mm at the front on a FS104WW Sybrand chassis (originally F104X1) and transform the car in a FS104WW/F104W hybrid with F103 foam tires.
If I use the ordinary F103 front parts I lose the front roll damper Sybrand FS104WW ability
I think 200 mm/ bigger 4,5 cm rear foam tires makes the car more stable and fast at our nitro asphalt tracks.