Just say yes! Ron Paul 2012
The only thing that i can answer on is the formation in which they utilized the runners in the 70s because I was under the impression this was common knowledge. They often used the wishbone formation with Czonka playing the FB there.
It would certainly explain why he was able to gain those yards because unlike in the formation common today, the wishbone was an equal opportunity employer. It seems to me that FBs are severely under-used in the run game now-a-days and I can understand why you would think it odd that a FB could accomplish what Czonka did.
and Czonka was a beastly runner who craved contact. He was also a beast of a man and was known to be a bit of a bad ***. He wasn't exactly the nicest guy to talk to but boy was he a player...