'70 Duster Dash Frame Removal
With the windshield out it's pretty easy.
Drop the column.
Remove the 5 or so screws at the windshield edge and the two bolts at the lower corners nears the kick panels.
Disconnect the bulkhead connector and heater cables/wiring. There are some additional electrical connectors at driver's side kick panel that feed the rear. Dome light switch wires (both sides). Speedo cable. E-brake handle.
That's pretty much it. Anything I missed will be obvious.
If the windshield is in then you may be able to cut the front screws from underneath. To reinstall you would put the u-nuts on the dash frame instead of cowl and run short screws in from the underside. The windshield gasket hides the screws.