1965 Dodge Dart 270 Dash Removal.

Sounds like you want to remove instrument cluster and trim from the dash frame.
I'm mostly a Valiant guy and the cluster is held of with four screws, also the speedometer cable and wiring harness are also attached and need to be disconnected. The steering column might also be in the way and can be dropped a few inches.
The trim is usually held on with screws ( plastic) or nuts (if metal ) from the back and this often means poor access installed in the car. You may find the cigarette lighter holding some trim in place, check to see if it unscrews from the back side, the last Valiant I did Incould reach it after the glove box liner was removed ( four screws).
Hope this helps.
A few pics would allow everyone to help too.