Euro633CSI engine rebuild

I have a 1979 633CSI that has a coolant leak into the oil. I am going to tear it down to find the leak and rebuild the engine. The problem is that it is a euro 633. Does anyone know if the main bearings, rod bearings, rings, etc. are different in the euro M30?

if i remember, block components, except for the pistons, are the same and only the crown shape of the piston would be different, the rings should be the same.

Thx for the info. I was hoping that was the case. Any chance anyone knows the most likely place for a coolant to oil leak? I was wondering if there was a weak spot to check first.