100%
Rod Pin
Silvertop 136.14mm 20.64mm
Blacktop 140.84mm 19.00mm
FRS 137.00mm 22.00mm
USA 139.19mm 20.00mm

The BE to piston crown is the same for each set.

I'm not sure what dimensions the Cosworth 'WRC' rods and pistons were made to, but as they are virtually impossible to find....

Steel rods from America (Eagle, Crower) are to the US dimensions, but supplies from stock (and pistons) are reducing, after all the engine is obsolete.

Martin