Here's a screenshot of what Joe H is referring to in his linked resource. If you want more decoding info on major components like the engine, transmission, rear axle, etc., check further in that linked document as you will find what you seek all right there.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)