I've learned that it shouldn't be too hard to modify a J to a B model B25.  Apparently the Doolittle planes were pretty much painted all OD green for the raid...very little color, even nose art.  The name Whiskey Pete was apparently just stenciled on under the pilot's windows...at least that is what I've learned so far. 

Hope to get the hang of this site and doing video so I can document the build.  Any suggestions appreciated.  I'm impressed with the skills you guys obviously have.   Will try to keep up.