It's a 283. Paired up with the Turbo 350 transmission it'll have plenty of power to scoot down the road. I wanted something at least a little economical as I plan to drive it pretty much every day once it is done. Plus, it came with the car and the guy I bought it from threw in the valve covers for free. When I first got them I thought they were some cheap knock offs but after cleaning I found the casting marks inside identifying them as authentic vintage Cal Customs aluminum valve covers. I was please when I found that out.