engine codes

[vinnie]

I know where the engine code letters are found on the nailhead engines we all use, but where are they found on a 430 and 455 engine. A friend has one of each that he has ask me to identify. Thanks for your help.

[Loren At 65GS]

Here :
https://www.teambuick.com/reference/ident_engine_where.php
  Scroll down, 400, 430 and 455 are at the bottom.

Loren