Yeah its a hydraulic motor to start with. 69 was the last year of the 273 so it is kind of one foot in the past and one in the future. More like a 318 than an old Commando style 273. But is a numbers matching block, heads, distributor, and carb. Nice.
The motor should do what is needed though. Its going back in a Convertible so 1. Sound nice 2. Easy to drive 3. ok gas mileage.