What else will my dash fit?

From 1972 thru 1976 the Clusters will all FIT in the hole but.....
There are some minor differences such as Seat Belt Light, Check EGR(?), and
Speedometer MPH/KPH (IE: 120, 100 or 140 MPH Certified (1976 A38 Package only), and 180 or 200 KPH).
Then in 1976 models they changed the Altermator from it's own separate Wiring to part of the Circut Board Pinout.
Also there was the Trim colors... Most are Woodgrain painted Brown, early Fleet/Police Darts had the Woodgrain painted Black, Then in 1976 the Black was a Pebble Grain Overlay.

Slant6dan... This pretty much covers this yes?

Hope this helped,
Later,
Bruce B.