Here's a graphic showing various Chevrolet hood ornaments from different years. The 1953-54 truck hood ornament is shown in the upper right on this page. It was a flying bird with a forked tail. I had a '54 Bel Air hood ornament I picked up at a junk shop hoping it would fit on the truck. It doesn't. You'll have to go with the truck ornament shown here if you want the "correct" hood ornament:

http://www.taillightking.com/images...Pics/chevrolet_53-60_Hood_ornament_5.jpg


My mechanic calls it an oil leak... I call it my truck's 'self-lubricating chassis' feature.