1927 Cadillac parts

[yachtflame]

Hello, I'm trying to help a fellow restorer out. He has a 1927 Cadillac sedan that is missing a few parts. I have a whole shelf of distributers but don't know Whic number goes on a '27 and I don't have a National book. Can any one help me with a model number?
He is also in need of a rear light and battery/tool box doors.
Any help would be greatly appreciated!
Thanks,
Wayne Elsworth
CLC#17057

[Johan Boltendal #158]

Should be most likely a  D 4023   Later engines have a  D 4032 both nrs after  two different parts books.  hope this helps Johan
one book how pictures as well let me know if needed.