Urs
It looks like your construction of the front inner panel is quite symetrical inside the Front clip. Usually the opening of the nostril panel is not centered in the front clip ( one of the design glitches of the original cars, if i remember right without having my car in front of me it is offset to the right side if you look onto it form the front.
If you have not corrected this in your mould, the front clip will be offset to the final wheel position to the left side ( again looked on it from standing in front of the car) if you make everything symetrical like it looks on the pictures. So your front clip will have an overhang over the tire more on ones side than the other. This makes your car looking akward somehow.
My reco is, stay away from pure symetrical measurements and try to achieve the best overall optical result. The nostril panel is closed anyway and noone will see a assymetrical inner construction.
Hope you understoo what i tried to explain.
Best thing ist to mount the wheels and suspension first on your ( i assume ) 100% symetrical chassis) and than align the body along the wheel lines and wheel centers.
Check out my build log, i´ve described there how i´ve done it, and without any bragging i think i still have one of the best aligned cars in terms of bodywork out there. Even if i have a RCR Body which is a copy of an original car and not a copy of another replica, the Nostril panel offset i have seen on quite a lot of Replica makes.
Thanks
TOM