I'll bet money that the 1966 to 1969 Hemi oil pan will work well in your C body, those two oil pans are almost identical looking compared side by side
I've used the those early year (1965 to 1970) C body oil pans after welding in slosh and acceleration baffles in early, pre 1966 B bodies with good results after the stock street hemi pans got to expensive and to hard to find back in SO CA in the mid to late 1980s