Is there anywhere to find info (specs, origin, which vehicle it is associated with, etc.) for a 6-226 engine by the engine serial number?

I plan to rebuild my 6-226 engine soon in my '58 pickup. I know that the engine in it is not the original one. The block was painted red, and I was told that red indicates that it was built for higher altitude (or some special purpose). Just trying to make sure I do it right.