Adding ac to my ‘67 Dart

Any input would be appreciated. I have access to a ‘73 scamp with factory ac. I see where the firewalls are different, but I was wondering if it would be worth the effort to swap it to my ‘67?
Concerns:will the 73 unit physically fit my ‘67? The control panel-is different also
Will the unit clear my factory console?
Would it be better to use a classic air unit, or similar? I would switch to a sanden compressor and parallel condenser if I would swap.