It has a 360 with 340 heads and a mild cam plus the intake (thanks FOG) and a 600 Holley. I still have the exhaust manifolds but works well. It was an original 273 when new. 727 with a shift kit and 3:23 sure grip. I'll get rid of the low profile tires one of these days for a better ride and put a larger tire on the back. I don't race it (I do get silly with it occasionally) but it's a cruiser. I may take the Flowmasters off as well and quiet it down some. Just a fun car and enjoy going to car shows with it and talking to people.