John took the time to scan Male Call comic strips that contain jeeps and post them at his google page.  Surprisingly, most of the drawings appear to be Ford GPs. You can view the cover of the book here.

He writes, “My Dad had a copy of this printing of Milt Caniff’s Male Call and had it stashed in the back of a dresser drawer. Fair game for a 12-year-old when I ‘discovered’ it in ’64. Don’t know what happened to his copy. Saw a copy on Amazon and grabbed it. I scanned all the images that include all or part of a Jeep in the strip. Consider this a fresh look, enjoy!”

You can see all John scanned here