Have no idea on how old the drums are. They have been cut at one point, They measure 9.530. There are no ridges on them.
It could have been acting like this for years. Just never checked.
When I put 4 wheel discs on the race car I kept locking up the brakes on a dirt road and adjusted the proportioning valve until al 4 wheels locked up and backed it off a hair. Thats what gave me the idea to check the 72's brakes.
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