“ Wasn’t the 283 a ford engine?”
289 was the small Ford V8.
There were no 289s yet in 62. There were small block Fords. I think 260 might have been available.
If you look closer at the vehicle you can tell it’s a small block Chevy engine.
I initially thought it might be a Y-Block because they, too had the distributor at the back of the engine. But the location of the exhaust ports is Chevy/GM architecture.