So? 80 lines is less than 100 lines, using 80 lines all over the project doesn't really have anything to do with anything, and besides that, all of our projects previously held to the 80 character line limit. The 80 char line limit is one of the things I hate the most about PEP8, it literally both makes no sense and is never helpful, so I'm going to have to overrule you on this one.

Unless you are using some tool that barfs on lines greater than 80 characters, I don't see why it matters to you really. It's not like it ever improves readability to have to read more than one line.