saturn 1b rocket

Check out this site. Rick has a Saturn V clinic and a host of links for the information you are looking for.  In addition, go to the NASA history site; they have a huge amount of information there as well.  For the S1B, make sure you decide what mission and whether test or flight article you want to build. 

http://www.spacemodelsystems.com/clinic.html

You might also find these useful;

http://apollomaniacs.web.infoseek.co.jp/apollo/saturn1be.htm

http://www.apollosaturn.com/frame-s1b.htm