It is good to see a survivor engine. While in 55-56 the sixes were blue, in 57 they were green. The harmonic balancer should be green and the air cleaner and coil are black. The exhaust should be unpainted (some possible green over spray is normal) and the trans should be unpainted too. The oil filter lid should be orange with the filter housing in blue.
It looks like most of yours is intact! I look forward to seeing it cleaned up and pictures of the car.
Good to see someone stating that in 1957 the 6-cylinders were green. Also, thanks Jim, for posting your photos and sharing what you have found. Back in 1986, when I acquired my unrestored 57 210, its 235 6-cyl engine was green. Over a year ago, I started a discussion regarding the Chevy engine green on the Chevy Talk forum and VCCA forum. It created quite a stir and was not well-accepted by the "experts".
In addition to my car, I have seen another 57 6cyl with a green engine. It was also an unrestored car. We removed the buildup of grease on the engine, and there was green paint. There is also reference to "57 Engine Green" in the restoration books, yet all this evidence is ignored.
I tried to find the Chevy engine green paint but all anyone sells is the blue. For example, Ecklers sells only Bill Hirsch blue paint labeled "Chevy blue '54-62 235 CI passenger cars."
If the 57 6cyl passenger car engines were indeed, green, I wonder why is there so much misinformation? Could it be because 1957 was the only year it was painted green, and then over time, forgotten by most people?