You are correct. 7C is actually a picture of a very special Ford Bronco called "Big Oly" built by Bill Stroppe. This truck really is the birth of what off-road race trucks are today. See the links below for more info about this truck and Bill Stroppe. The truck still exists today!!

http://www.bajabronco.com/BigOly.shtml

http://www.shoptalkforums.com/viewtopic.php?t=119511&start=0

http://www.expeditionportal.com/forum/threads/59980-New-to-site...early-bronco-driver!/page2