my air dam is in poor shape and was wondering if all the cutlass/442 models used the same part?

 

The air dam can be repaired and restored. If it's the masticated rubber that's deteriorated it can be replaced. If the plastic is hatched, you need to find another one from one of the guys who parts them out. 70-71 air dams are identical.
Here's a link to when I rebuilt mine.
The Overlooked Airdam

 

thanks Allan!!