Thanks, folks. I found a junkyard car with some front calipers that worked when the thing (busted drivetrain) came off the truck. I may yet end up resealing them, though I hope they will be decent as is. Will know tomorrow when I remove them.

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'Betsy the Getaway Car' : 1978 MB 240D, 582k
'The Mistress of the Sea' : 2001 Giant Boulder, 10.30k