Originally Posted by InspGadgt

Sorry...forgot you use rubber tires there.

Sure the modern bodies will work with the F103 front end. It will just look a bit...off since the wheels/tires will be 20mm wider than the front wing and smaller diameter than the F104 wheels/tires. At 190mms it looks fine so if you go with the F104v2 or another 180mm car and widen it to 190mm with the R-Sector kit it will retain its scale looks (If your concerned with that). Theoretically the wider car would have the advantage in handling so some people would want to build the car to the max possible to get any advantage they could. But from 180mm to 200mm all on rubber tires the cars are going to be so close it is mostly going to come down to driver and setup