Chrysler 35 Identification

[ages802]

Hello,
I recently purchased a "fixer upper" boat that came with a Chrysler 35 outboard, and I am looking for its serial/ identification number.
From what I've been reading, there are different types of Chrysler 35 outboard motors, and eventually, I'd like to know which one I have.
Also, I'm looking for a repair and tune up manual to purchase so I may perform all the preventative maintenance needed.

Here's what I've found so far within the motor:

-preston
-b10
-mgo-46023

Thanks for the replies!