[Mg-t] Brake drum spec

[JohnD]

I had my drums miked yesterday and the counter guy said one was .030 "under"
and the other was .065 "under".
They seem to be 9" drums. Got to thinking..."under"?  Shouldn't they be
"over-size" as they wear and get turned?
What is the spec for the ID of the rear drums on a TD? Who has replacements?
Thanks.
John Deikis
*Running the Rallye to Reno in a '53 MG TD*
**MG Drive for CURE <http://www.kidscure.blogspot.com/>