It'll bolt on, but they aren't the same.
On the '62-'66 hoods, the lower panel that houses the marker lights/turn signal housings is different between Chevy and GMC. Look at examples in the gallery to see what I mean. The shape of the lights is different, and the openings in the leading edge are different.
The cowls on the '60-61 Chevy and GMC also have different inserts. Again, they're all interchangeable, just not "correct." I'm going to put a '62-'66 GMC hood on my Chevy, because I like the look of the openings.
-Brad
