I looked up that it was a 289 according to the casting # on the block. Its def a chevy. Came out of an impala and the casting number was chevy. Flairs were already on the car. The shell was excellent. No rust. Floors are solid, battery tray has nothing, even the trunk jam areas are insanely clean. It was a score. You guys will get a trip once we show you what wheels we got for it. Stay tuned people.