In all honesty...if you are asking this question, (I hate to sound rude), but you don't have a clue and should not be touching anything on your bike.
The 97 Dyna was powered by the EVO engine...HD stopped using that engine in 99 on the Dyna's and changed over to the Twin Cam engine. They also totally re-engineered the frame, swing arm, braking system, charging system, added fuel injection to some models, wheel and bearing styles, etc...ALOT of changes have been made from 97-03....and DOZENS more since then.
The answer is.....NO...the 97 manual will not work for an 03.