There is a gear in the odometer that is made of rubber. Commonly in Daytonas and Shadows of 91 and prior years the teeth on this gear become brittle with time and break away. I think there is a website odometergears.com or a similar name where you can buy these replacement gears. I am 100% sure this is the reason your odometer and trip gauge are not working as this is the issue with my 91 non-turbo. The speedometer thought that should still function irregardless. I would reccommend you pull your entire gauge cluster and re-solder all of the electrical connections. Another common problem with Daytonas and Lebarons is electrical issues. The original soldering connections get old and current doesn't flow through them as well as it should if at all and I have heard that sometimes reheating the soldering and letting it reset will sometimes fix electrical issues and its rather cheap and simple fix.