Chevrolet 216 235 (early) main bearings? The same?

[Alex van de Wetering]

they are oval shaped

Mike; do you mean the radius of the bearings is bigger than the radius of the caps? I guess that's a good thing....as it clamps itself inside the cap, rather than around the crank, right? (wishfull thinking maybe )

Did you use the NASCO bearings for your C8 at the time?

Lynn; thanks again for your ideas. Maybe, getting a proper newly made bearing kit is indeed the way to go, but I have some leads, one of them a very good offer from Mike, so I want to see if this could be the solution for my engine.
But I agree...with so many wrong descriptions of NOS bearings sets around, it could be wise to spend some extra cash on a set from one of the Chev parts dealers in the US instead.

Talking about oval shaped bearings......Do two bearings shells clamped together by the caps from a perfect circle?......or an oval, with shims needing to be added to get the result to be a perfect circle?

Alex