For those chasing numbers there are a couple of books that I rely upon to decipher numbers. The first and most widely acknowledged expert in the field is by Alan Colvin and is entitled Chevrolet by the Numbers. He has four books that covers the ranges of 1955-'59; 1960-'64; 1965-'69; and 1970-'75. In addition to listings of casting numbers for blocks, heads, intake manifolds, exhaust manifolds, distributors and water pumps, he has a listing of all of the pistons used, and carburetors. He lists the application codes for every Chevrolet automotive engine made during that time frame, as well as the rear axle and transmission codes. He has actual segments of GM engineering drawings that illustrate the changes in part numbers over time as features are added or deleted to castings. He also has a separate book just for Corvettes which is how he got involved in chasing numbers to begin with.
I also use Mark S. Allen's pocket book called Chevy Cowl Tags: 1950-'75 which deciphers all of the cowl tag code VIN numbers Protect-o-Plate and lists all of the date codes and how to read them. Mark also wrote a separate pocket book called Chevy Impala:1958-'70 that lists Production Information, Casting Numbers listed Chronologically, and again Sequentially. He also includes information on decoding transmission and rear axle codes, and concludes with a list of all of those part numbers used to build your car that are now out of date: being either obsolete or superceded by a newer number. like I said these two little books are pocket size and are handy to carry with you into the field while looking at projects. They are just type written in courier font so there aren't any pictures or illustrations to break up the monotony, but they are well researched.
I have thought of mining the assembly manual for every part number involved in building a car (whether an Impala, Camaro, or a Nova, but as you can see he beat me to it).
Finally the "Bible", as to part numbers is as stated the Assembly manual. If you like numbers it has them all. Surprisingly the Fisher Body manual which you would think would list useful stuff like interior information is all about finding parts to repair collision damage and knowing where the decals go on the car (I'm talking those wall paper sized wood grain decals for Estate Wagons and Camaro bumble bee stripes).