if your gonna plan on an lsx swap, the best help ive found so far is from the books. for about $20 each they have a ton of good info in them.
Amazon.com: How to Rebuild GM LS-Series Engines... Amazon.com: How To Supercharge & Turbocharge... Amazon.com: How to Build High-Performance Chevy...
those three books go over in great detail the history, design, and models of ls engines and where/which vehicle they can be found in. ive got this one on the way
Amazon.com: How to Build and Modify GM LS-Series... but i hear its also a great source of info. my eyes get real sore reading computer screens for too long, so i find having a book is a great resource for me.