If you would like to contribute to this mod, you can post here or at the Paradox Plaza forum thread. All contributions will be credited,

Current contributions that would be helpful:

Placement of buildings on map for each province
These were auto-generated by the Vic2-HoI4 converter or by the nudge tool. If you want to help make it look nice, that will be much appreciated.

Flags and Portraits
Although this is an alternate history, most of the countries start as their historical examples with historical leaders. If you know who the leader of a country should be and can find a period portrait, that would be great. Additionally, some of the flags need to be corrected to the period examples. Though at this time, the idea of a national flag was not widespread, so a battle standard, naval enisgn, or monarch's insignia may have to do. Make sure any images are public domain, non-copyrighted.

State Improvements:
Current states are mostly based on the Vic2-HoI4 converter, thus on Victoria 2. If you have suggestions to improve the placement of provinces within states or balance improvements (state category, resources, or other), that will be appreciated as well.
Placement of cities (victory points) will also be helpful, you can comment which province the city should be in (use tdebug from console to find province ID).

Information about the 1632 series can of course be found in its various books, but also at its primary fansite: 1632.org

Added:

I want to update victory points (cities). If you want to help, identify what city should go where (state and province id) and send me a list.

I am looking to add advisers based on history and the series. For historical advisers, please point to a public domain portrait with suggested trait (new traits can be considered).

Balance is more of an issue now. Please let me know how the mod plays and if you have particular suggestions (please make enough observations to get a pattern).

Several major nations still lack focus trees, if you are familiar with the events of the series and would like to contribute, please do. If you just have a few suggestions, I'm happy for the help.