I agree on the books. I recommend the three below which I have read. Helped me learn a lot and makes feel more comfortable to tackle an engine rebuild. Even if you decide to have somebody else do most of work, these books will allow you to speak knowledgably with them.
1) how to rebuild small block chevy - very well laid out book with numbered steps, info throughout and what parts to choose. Comes with two hour DVD showing rebuild.
http://www.amazon.com/Rebuild-Small-...497122&sr=1-17
2) how to rebuild by David Vizard - similar to above but not laid out with numbered steps, just a sequence. People seem to say David is very methodical and recommend his books. Book info and engine tech a little older but recommened as another source to #1 above.
3) John Lingenfelter on rebuilding small block chevy - does not get into actual how to rebuild but more of why to do certain things and part combos. Also has good insight on TPI motors. Is worth while since book is $14.
http://www.amazon.com/John-Lingenfel...497097&sr=1-12