Hey it's your car if you want Shelby trim then GO FOR IT and don't let anyone talk you out of it because it's not "original". I have a 65(actually a 64-1/2) coupe done in GT 350 trim and I get more positive responses than negative. If you had a rare model with low mileage then maybe sticking to original might make sense but with a standard mustang what ever YOU want is what makes sense. I have the GT 350 scheme in red with white stripes, fuel injected 5.0 with T-5 five speed, non-standard p/s, p/b,a/c and suspension along with numerous interior modifications. If I had went "original" I would have a 6 cylinder car with am radio, manual steering, no brakes(well almost no brakes anyway) and 13" wheels all on a car that handled like a wagon but I STILL get people who try to tell me I made a big mistake!