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mikequig and 1980SC,
My mistake. The Euro pistons are the same size as the USA
pistons at 95mm. The difference that makes the euro 9.8:1 is the dome-size of the piston. You are also correct that using 98mm pistons would result in a 3.2 litre displacement.
However, as I may have indicated, that would be preferrable over the the Carrera 3.2 because the increase in diplacement on the Carreras was a result of the +4mm increase in the connecting rod.
So, while a SC has 95mm pistons and 70.4mm rods the Carrera has 95mm pistons and 74.4mm rods - which are just a hair beyond the reliability threshold of the SCs. Many Carreras end up with oval shaped con-rods (crank side). Plus, they also have a smaller-sized wrist-pins, which is also not good.
So, remember "SC" stands for Super Carrera!
best,
Maurice Perkins
1980 SC Coupe
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