Yup U r right, That's the standard wheels, and the chasis have not been mod yet. I will build the Orange one OOB, the Yellow with mid Mod and the Green one with Custom Body kit.
And here are more progress,

These are the wheels that I will use on the other 2 Diablos.
MY98 Giallo Orion Diablo

Brake discs replaced with spares from Fujimi F430 Challenge, only minor add-on using plastic tube

Sprayed with TMY Lemon Yellow
MY99 Verde Ithaca Diablo

Modding Aoshima Brake Disc: I cut out the center part from the kit's paria disc brake and cement to the Aoshima ones... easy.

The brake set are from Aoshima VIP cars.

the front tires need some mod....

Cut bit of the rims...

Done...