when i needed to do the same thing during my 56 restoration i did a google image search for "1956 chevy truck underhood" and dozens of pictures came up. i did it again when i wanted to see the the type and location of the rubber bumpers that go on the doors. try it for your '62 - you might find the angle you need. search on "firewall" too. you'll certainly find other interesting trucks to look at!

here's just one example (for a 65):

http://s6.photobucket.com/user/racecougar/media/The%201965%20C10/firewalldiagram.jpg.html