It is not possible to install a dizzy with 351C gear into a 351W and run the motor ( The 351c gear is larger in dia & will not fit--short of using a large hammer & then it wont turn
).
Now you raise the possible issue of camshaft gear material & distributor gear material compatibility--- The camshaft ( metal its made from & who built it ) dictates which type of gear you must use on the distributor.