I picked up a Chevy 292, supposedly from a C60 truck. The block casting number (3921970) and head casting number (3927763). The block casting number indicate that the the engine was manufactured between 1963-1976. The head casting number indicates a manufacturing date between 1967-1972. The crank has 3 dowel pins and it came with a generator, I am guessing that it is most likely from mid '60's.
The block is Chevy orange. The head is a blue/silver.
Ideas why? Replacement head?
When did Chevy use blue/silver for their engines?
When did Chevy convert from generators to alternators?