Books

I agree with abv posts, service manual, chrysler interchange manual 68-74 by Paul Herd, here is the link [ame="http://www.amazon.com/Chrysler-Interchange-1968-1974-Motorbooks-Workshop/dp/0760304203"]Amazon.com: Chrysler Muscle Parts Interchange Manual, 1968-1974 (Motorbooks Workshop) (3700160304204): Paul Herd: Books[/ame]
As oklacarcollector said, dont pay the full price, be patient and get one a lot cheaper.