All I can find written down is that the 371/394 block from '59-'64 is 1/8 taller then the earlier block. I got my 394 on a stand in the garage the block is bare, I can ball park you but I can't do much more then that as I don't know how much has been shaved off my decks. Maybe @GOATROPER02 can answer that one.
As a matter of fact, I needed this measurement for a friend of mine who is installing a new cnc machine at....Ross Racing. Tony is down in Texas at the Lone Star roundup so I couldn't ask him. All my notes, even an Olds service manual and you'd think I could find it? NOOOO. Thanks anyway!
If it were not for all the mods to my motor (back in the '60s) I could give you an accurate measurement. Sorry to be of no help. You may comb this thread and see if there is any help, There is a lot of info there. http://www.jalopyjournal.com/forum/threads/rocket-oldsmobile-v8-information-compiled.715390/
If you're going for the total deck height you have to figure in the head gasket too. .035 is safe, most builders say anything under .050 is good