Vibration at 75mph. Bad hub?

[quote1969436241]
On my 71, the race sits about 3/8" above the lip. One thing I noticed is there is less of a lip on one side, almost like the hub has been rounded out. [/quote]

There's something wrong there. The race should sit flush with the lip of the hub. You may need a new hub/drum assembly.

Posting pics may help figure it out.....