Here's the first part of the 147th issue of Cracked from December 1977. Cover By John Severin signed with his middle name. The contents page has a blurb saying:
AHA!!! We caught you, Sylvester! Man, you sure had us fooled; we always thought John Severin painted the covers. You better finish your self-portrait in a hurry 'cause you'll look awfulon the newsstand like that!!