1980 Camaro base model

Hey! I’m 19 years old and know very little
about cars but want to learn a whole lot
more but can’t even figure out really where
to begin. I recently got my hands on a
1980 base model Camaro with a
aftermarket v6 engine and automatic
transmission. I’m looking to do a v8 and
manual swap myself (with a help of some
knowledgeable friends and their dads). As
of right now I’m thinking of getting a Chevy
performance 383 block and building from
there and the transmission im not even
sure where to begin on that especially on
what is comparable or not. So if anyone
has any knowledge on this or any places
where I can start to figure it out it would be
greatly appreciated!