Actually head and block. Anyways I am new to this forum and see there is alot of good info here. I have a chevy small block in my truck and I do not know the size . Why well I had the engine replaced by some one becuase I was injured and could not do it my self. Well I got to thinking maybe they did not put in what I told them they went out of Bussines a month later. So I started looking for block numbers and Have not found any still have to crawl under neath and behind. On the passanger side head I found this 11-7 and under neath it Eagle 1 any ideas?