Mike,
Whilst looking at these cars, did you notice the style of front/rear calipers by chance?
I was thinking that some may have had a 3 piston front caliper???????
Normal (what's that??!) would seem to be the CR 2 piston caliper up front with an ORA 2 piston caliper out back, with a sprinkling of 12/3 3-piston calipers (marked Fiat Girling...cast iron) out back.
Cheers!
Steve
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