The best money you'll ever spend on the ol' '64 is for a gennie shop manual or gennie shop manual reprint.....
http://www.faxonautoliterature.com/products.cfm

I've relied on Faxon for decades. They provide a quality product for a reasonable price and they furnish GENNIE ORIGINALS that make sense, not some fosdick Haynes or other type that doesn't have the info the gennies do.

Here's Doc's book on Amazon for 33 bucks.....
http://www.amazon.com/s/ref=nb_ss_b?...ader&x=12&y=14