There is a similar book at my college's library which contains results from 1836-1972 or so, including votes on particular resolutions on the floor of the conventions, if you'd be interested in that.
If you could put up the information on the state delegations in the 1964 Democratic Convention and how they voted, that would be great. Can you tell me the name of the book? I may just end up entering all that information into Wikipedia or something just so that there is a permanent resource on the internet in regard to that.
And thanks again realisticidealist, those spreadsheets are going to come in handy.