If you are looking for a "new" hood ornament for your GMC you might check with forum owner OldCarKook (Rob English) on the OldGMCtrucks forum. Another forum member "Lars" has made a few reproductions of the GMC hood bird. He is in Germany, so he sent them to Rob to sell. I understand that they are very nice work. Not cheap, but if you are doing a real restoration probably less than finding an old one, getting the pitting fixed and a quality chrome job. Rob can be reached at [email protected] Tell him I sent you and he'll jack the price 25%. 
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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