Restore 21CT55 to schematic or as built?

[Zenith6S321]

This is my first post, but I have been reading posts for a bit. Great forums! I am starting the restoration of my RCA CTC2B 21CT55 chassis serial number B8802628. I bought it in the early 1970's and am finally going to attempt to restore it. I bought capacitors and resistors based on the Sams parts list. I started comparing the convergence chassis wiring against the Sams schematic and find missing/different components. I expect this is due to running production changes. Is it generally recommended to restore a chassis to as built or to the latest dated schematic? Anyone know if the Sams 21CT55 schematic represents the "first set" or "final set" design? Any guidance would be greatly appreciated.