* Inline-6: A 230 cubic inch (3.8L) straight-six was a base engine option.
* Small-block V8s: Several variations of the small-block V8 were available, including the 350 cubic inch (5.7L) in various horsepower ratings (ranging from roughly 250 hp to over 300 hp depending on the configuration). There were also 307 cubic inch (5.0L) options.
* Big-block V8s: For those seeking more power, there were options like the 396 cubic inch (6.5L) and the mighty 427 cubic inch (7.0L) big-block V8s. Horsepower varied significantly depending on the specific configuration of the big-block.
To know the *exact* engine in a specific 1969 Camaro, you'd need to know its original build sheet or VIN.