Old time ballparks

I'm just curious ...
Where can I find information on the dimensions of ballparks not included in the current listing?

I'm especially interested in Polo Grounds '62, but also other parks, like the Seattle Pilots' stadium in '69, and any other historic stadia that may not be included in the online game.
Thanks!

https://www.strat-o-matic.com/baseball/ ... ct-charts/

https://ballparks.com/

Apologies if this is too off-topic, but how do new ballparks get added to ATG anyway? A while back someone pointed out there is only one park from the entire 1980s which seems crazy.

Try Clem’s Baseball it’s very detailed

http://www.andrewclem.com/Baseball/Stadium_lists.html