This is my first old truck and I have no idea what or where to get a oil filter. My local auto parts said they don't show a filter for my truck.

1962 Chevy C10, inline 6 (not sure what size), oil filter seems like it would be a canister type that goes in this container on the driver's side of the engine??

This may seem kind of stupid but I have never owned a truck of this age that does not have a screw on type / external filter.

Thanks in advance for your help!