which ims bearing upgrade

[Gelbster]

Originally Posted by JFP in PA

I seriously doubt it; I have never seen an engine that showed any signs of an IMS bearing failure that did not have metal everywhere in it.

I am guessing but I think what JFP wisely means is that if there is any metal missing from the IMSB - it is 'toast'. In which case I agree. Perhaps I misunderstood the 'smearing' description of the race and thought that no metal had separated ?
I had a similar issue and just dismantled the entire engine ,repaired/rebuilt it and we'll see how long it lasts....I was lucky that the collateral damage was minimal.