1970 Duster factory chassis paint details.

I'm a brand new member. I just picked up a 1970 Duster with a 340. I would love if someone could help me. I want to paint the underside and suspension and wheel wells as close to factory as possible. I have tried to find a restoration manual but I have had no luck. Are they all body color? Thanks again for any advice. This car is not a show car, I just want the things that need attention to be right.