Chrysler designers were showing the new 1997 Jeep Wrangler to a group of hard-bitten, skeptical Jeep fanatics. The Jeepniks, says John Herlitz, Chrysler Corp. vice president of design, crawled underneath the Wrangler and poked around for about three minutes. When they emerged, they pronounced it a real Jeep. Recounts Herlitz:'One of them said, 'We thought you guys would have neutered the last stud bull on the ranch.' '