I may have a similar vibration in my right front wheel. Especially at high speeds when I brake, I feel a vibration. I suspect wheel bearing or brake disc warpage, but would be curious to see what your problem is. Try replacing (or resurfacing) your brake disc and see what happens.
Bert
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'70 111 280SE/c 3.5 (4 spd manual) - sold
'63 MGB
'73 MGBGT V8
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