Here are the R-1820 parts catalogs I promised - all watermarked ww2aircraft to prevent them showing up on a particular resellers site. All are Wright (not AAC/AAF) manuals.
First of four is the Wright GR-1820G-200 Parts Catalog.
Second is a 1945 revision to that manual
Third is the Wright R-1820-G-100 Parts Catalog - my apologies for page 1 but I am not willing to put it thru the scanner again.
Last is the Wright GR-1820-G-100 Parts Catalog.
Hopefully someone else out there will have some other R-1820 manuals to add.