That 0.5% of car enthusiasts that know the 550 will know the car is a replica based upon the proportions. But 1/2 of that group will still admire all the attention and time you have into your build. The other half of that group are total snobs, so who cares what they think?
The other 99.5% would think it’s real if you had an “8-ball” shifter knob on it.
One day, in the near future, I’d like to either make or buy (probably buy, because we’ll #idiot here) the shift knob from the 917.