http://www.tpub.com/aviation1.htm
This may be a little technical for most modelers (like me), but it has manuals for working on most modern planes with lots of blow-up detail photos of the real thing. You might want to check it out.
BTW, I found this site while trying to find out what a Navy Mk. 51 bomb rack looks like. Does anyone know what this rack is? Is it the standard early-war navy rack, like we see on the SBD?
Tom