Putting together ac system on my 71 skylark and see that the blower motor wheel has 4 broken ribs other words pieces are missing. Tried to find replacement wheel but all I can find is metal and mine is plastic. Also the diameter is too small on the metal wheel but I am wondering if I could just drill it out to fit. All anyone list are the no ac type. Maybe this is the reason for the mismatch because this car originally had ac. Whats the deal?
