Hi John
Here is a list of sites you might want to check if you have not seen them
http://www.stovebolt.com/search.htm Lot of good Chevy information takes a little hunting around
http://www.speedwaymotors.com/p/6906...n-Headers.html These are the two piece exhaust pipes, you can find them for less than this on e-bay sometimes. But watch out for the shipping charges.
http://www.secondchancegarage.com/public/632.cfm beginning point for specifications
http://www.brads41-46chevys.com/index.html good source of information
http://aera.org/techtools.aspx best online look up I’ve found for casting numbers from this you can get the year of the block. Don’t be surprised if the different engine parts come out having different years, chevy 6s are real mix and match sometimes.
http://chevy.tocmp.com/ good source of on line manuals for Chevy’s
http://www.chevytrucks.org/tech/engine1.htm pretty good step by step set of articles on Stovebolt engines
http://www.stoveboltengineco.com/howto/engineswaps.htm similar to above
http://www.inliners.org/ good informative web site also has Full Flow Conversion Casting #'s