anything cab related is the same for all models, fenders are completely different, hoods would be the same as long as your C50 isn't an LCF (low cab forward) cause if it is the hood would be shorter then a hood off a C10 and for which years would be the same it would be 64-66, 60-63 is basicly same truck just those cabs have wrap around windsheilds and doors are different
Nate