Most of my stuff is LT1 related and may not be B-body specific but
I find it all to be good reference material.
I will keep editing and add to this post as time allows.
Injector Cleaning Steps http://www.cruzinperformance.com/injsteps.html
GM VIN Decoder http://www.theherd.com/articles/gmvin.html
LT1 Rebuild Article http://www.enginebuildermag.com/Article/2562/rebuilding_the_chevrolet_lt1_engine.aspx
VERY Detailed Instructions to Polish Stock Rims http://www.impalasuperstore.com/naisso/forum2009/topic.asp?ARCHIVE=true&TOPIC_ID=20868&SearchTerms=polish
Car Craft Article LT1 performance basics http://www.carcraft.com/techarticles/lt1_caprice_tune/index.html
Bee Hive Spring Article http://members.shaw.ca/betterthanyoutoo/how-to/vortec/vspring.htm
Site with links to WX3 Magazine articles http://www.depanorama.net/impala/
Idiots Guide to OptiSpark nice inside look at how it works
Car Craft Article Opti replacement how-to R/R Opti
Wiring Diagrams B-body http://www.goldsswagon.com/diagrams/wiringindex.htm
Bonneville Seat swap Bonny Seat install
Trans-go shift kit how-to http://www.inegma.net/mb/index.php?showtopic=3039
that's all for now...