Im trying to figure out what type of trunks can do caller ID (depending on the carrier of course)
Correct me if im wrong but any Class trunk either embeded in the MX or a combo card in the AX or a 8cct Class card can do caller ID correct?
Also a PRI can but a T1 and LS/GS trunk cannot correct?

been looking through the docs and can't find anything that explains this.

LS/GS and DID would be no. You can get number on T1 if provided can send *ani*dnis in sprint or mci format. You have got Class covered as well as ISDN.