Really pleased so far with the Auto City glass in my 70Z. The tinting is very good with none that I can see of the "spotting" I've seen on others.
The curvature on the side windows is also very good. It took a little bit to get them adjusted, mostly due to my inexperience and going slow. My understanding is that these windows are tough due to their size and being frameless. They ended up just about perfect. I think the 70 Birds used the same glass.
There was a tiny spot on one that wouldn't come off with glass cleaner or my fingernail. I tried some cerium oxide I had and it came off in seconds of rubbing.
More info here on second gen Firebird glass.
The DOT coding is interesting and something I didn't know.
https://www.transamcountry.com/commu...?topic=83409.0