ever since i completed the retoration of my 65 Convertible about 6 years ago I have had a vibration in the left front. I have completely rebuiltthe front end, replaced and balaced all 4 tires/wheels several times and the vibration is still there. it only happens at 45- 50 MPH. The only thing I haven't done is replaced the Brake Drums ( they are the original Drums with about 147,000 miles on them, could the problem be that one or both brake drums are out of balance, any ideas? I can actually see the left front fender flutter up and down when zi have the vibration and i;ve haad my Wife drive besideme an see can,t see any wobble or bouce in the front wheels. :flag