Heres one place to get the shop manual from.
http://www.faxonautoliterature.com/products.cfm

They are supposed to be printing the assembly line manuals at some point which show very detailed breakdowns of steering columns, pedal assys, brakes, bumpers, etc.

You can get the 1970 Challenger shop manuals new & used on ebay too.

Heres where you can get the e body fastener book:
http://www.mmcdetroit.com

Try posting a wanted ad on here for used one.

PM me your mailing address and I'll send you some of the E body books & mags I don't have a use for anymore.