Well hi everybody. I am new to this great information hot rod exchange a I truly believe this is a great idea. I recently bought a 1957 Chevy truck 1300 series and I need help in figuring out the displacement of my motor. The intake numbers read as follows: 3927183. The head numbers register as 3927185. The casting numbers on the block are 3932338. The code on the block is CE883016 with 6324 below it. I have done some research and the numbers on the intake and heads indicate being from 1969 and of a 327 small block. The casting numbers indicate being from 1957 to 1967 and a 283 small block. The code numbers, on the other hand, indicate a 265 small block. There is also an unusual breather hole on the upper rear of the block that I have not figured out what it is. Any help is greatly appreciated since I have been debating whether to rebuild this engine or not.