When I ran dirt track hobby cars, we cobbled up a 69 C body with an 833, pedals, linkage, and all out of a late 60s/early 70s B body car.
It wasn't pretty, but served our purpose, on the dirt track. I'm not so sure I would have wanted to put it on the street.

Guess what I'm saying here is I would not recommend using any Mopar factory stuff to put a street driven C body together. Gene