I don't really post here ever, but I think I have something worthy of sharing with all of you. (or at least the guys that like the 2.5L Iron Duke)
When I was at a Fiero show a while back, I picked up a "Pontiac Performance Plus" super duty engine and IMSA racecar construction guide. It's a pretty cool book that shows how to machine SD blocks and heads, has a lot of illustrations, has dimensioned drawings of the block and head, has part numbers, etc. Anyway, I was feeling ambitious and scanned the whole thing in and turned it into a PDF. The final file size is 14.8 Mb... it's big, but worth the download. 64 pages of historic Pontiac goodness.
Here is the file... right click -> save as
http://www.kettering.edu/~bejc9858/HotRodSD4Guide.pdf
I'm not sure how long I will leave it on, so get it while you can.
-Andy