monkey, that site is not something that GM or the govt handed us, read the top of the page [
http://chevy.oldcarmanualproject.com/ ], it's a volunteer effort, depending on donated material - if you particularly want the 60 shop manual there buy a copy and donate it to Keith to scan and add, or because he always has a deep pile of stuff to do, maybe you could scan it yourself and send a copy in .... and note it doesn't "show every year", so maybe you'd volunteer to do some of the other missing years as well

Bill