There's some great analysis about Harvey Kurtzman's Hey Look pages at John K's blog today. I could start a huge loving rant about Kurtzman, but instead, I'll just beg you to go over to John's place and read what he has to say.
Suffice to say that it was reading Harvey Kurtzman's Jungle Book hardcover back in 1986 that got me back into drawing after a nasty period of burn-out. Kurtzman got me excited about funny comics at a time when there wasn't much to get excited about. I found out about his brilliant Hey Look comics later that year when I found a beat-up copy of Kurtzman Comics at Hi-De-Ho comics in Santa Monica. That little 32-page underground comic included Pot-Shot Pete and a variety of Hey Look pages.
A few years later, Denis Kitchen put out the complete collection of Hey Look and Pot-Shot Pete in the now-hard-to-find Hey Look hardcover and paperback. Since it's long out of print, that book's quite expensive these days, but if you're a cartoonist, it's literally worth ten times what they're asking. There's a link to used copies at John's post.
...and for those of you that have never seen these pages, there are a few nice Hey Look scans at John's post, too!