Is there any way to PERMAMENTLY eliminate rear main oil leaks?

Nick's Garage had a video on Old Leaky, a 383 that he could not stop from leaking at the real main. After numerous attempts, they found that the engine was line-honed and the cap side seal was barely touching. Fix? Grind a little off the mating face of the cap bringing the seal tighter to the crank. Problem solved.


Wouldn't that change the bearing fit and centerline of hole in relation to the crank. Shim the seal?