A car from the period with a heavy mid V6 engine was the AC 3000ME.
What rear calipers were used on those?
The AC 3000 has a 250 x 12mm rear disc mated to 3 piston caliper (yes 3 piston!) which also has a piggy back handbrake assembly which hangs below the main caliper.
"You can lead a horse to water, but a pencil must be lead"
Stan Laurel
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