Yeah thats definately a 58-59 hood you got there in the first pics, that will only fit a 4 headlight fender setup unless you do alot of fabrications work (like I did).
You can see what I did to fit a 58 on a 57 on my build page starting at post #370
http://67-72chevytrucks.com/vboard/s...663322&page=15
The 55-56 hoods are pretty much smooth with no shapes added into them. The front edge is very high, most people slit the sides and cut them down in the front a bit to give it a little slant.
The 57 hood is one of a kind in that it has more of a slant than the 55-56 and it has the 'darts' that run the complete top of the hood.
