Good place to go for service manuals. autobooksbishko.com Bought myself a copy of the 72 year service manual in a CD. They also have a Parts catalog with all the parts number and pictures.
There is also a website with Parts and Illustrated Parts manuals for 1961-1972 Buicks, though the site says 1940-1972. 1961-1972 Buick Parts and Accessories Catalog — http://wildaboutcarsonline.com/cgi-bin/pub9990334158924.cgi?categoryid=9990334161791
