Which Engine Rebuild Book??

Thanks for the book recommendations guys! The 69 340 is bone stock, I have had the heads done with hardened valve seats and cleaned up thats about it. I want to give it maybe a little more "lump", and was curious if a relatively "stock" 340 could handle a 6-pack? It would be nice when I went out to shows if I could swap 4bbl and intake for the sixpack set up?
Thanks!