383 - 432 Issues
With all upper bearings and crankshaft in the block but no main caps installed you can see the radius of the crankshaft and the edge of bearings. Does it look like any bearings are into the radius, pushing crankshaft? If not, and if every other dimension of the crankshaft is correct I would think chamfering the block and cap to clear that slinger should be fine.
That side of slinger does appear to have quite a large radius of its own where the interference is.