I have been writing a series of how to articles on building a small block... I am not finished with all of them yet, but you may want to use them as a reference...
Here's a link to the main page for the How-To articles:
How To Articles | For A Bodies Only Mopar Forum
Here are the links to the ones for rebuilding a small block that I have done so far, I may be able to do one more this weekend on how to install the pistons....
How to Rebuild a Small Block Part 1: Block Prep
How to Rebuild a Small Block Part 2: Cam Bearing Install
How to Rebuild a Small Block Part 3: Install Water Jacket and Oil Galley Plugs
How to Rebuild a Small Block Part 4: Pre Flight Inspection After Machine Shop Before Assembly
How to Rebuild a Small Block Part 5: Crankshaft Install