The first run of Chickenman consisted of 187 episodes, so they say, with additional shorter runs to follow such as Chickenman Versus The Earth Polluters and others. Here is the first batch of 93 episodes from the first series with the remaining 94 to follow.
Dick Orkin of Chicago's WCFL Radio created the campy Chickenman character in 1966 and voiced it for 273 or so episodes. The complete 14 CD set of Chickenman is gone forever it would appear. The Best Of Chickeman record is also dead. MOSTLY dead. Link in comments.
The show ran for almost 2 years beginning in 1973. The bad taste had to be toned-down for air I would think. There are 50 or so of these hour-long episodes. Here are the first 6 of them in a zip file that is 389MB in size. You like Nat Lamp, I bring you more Nat Lamp.
This is out-of-print. Used physical copies of this book are available on Amazon for $95 if you like. Also included is an interview with the founder of the National Lampoon, and an episode of the National Lampoon Radio Hour. Party on.