Identifying the 350 in my truck.

I have a 69 Chevy C10 with the stock 350 and tranny.

Looking for 2 things.

1. How do I identify exactly which motor is in this truck?
2. Where can I get a manual to walk me through tearing it down and
completely rebuilding it.


Newbie here. Rebuilt the same model/year with my dad as a kid and now
I'm hoping to do the same with this one.

Thanks.