I was about to say, "Absolutely not", but then I came across this:
http://deckwartaperedshims.com/main-bearing-shims-product-info.phpNot saying this should be your first choice, but it does suggest that an option is possible. The problem with the shim used by previous owner is that, to do anything, it requires filing off the ends of the bearing. This probably left an egg-shaped hole for the crank to fit in and, I think, leading to rapid wear on the bearings 90 degrees from the parting line. For the sake of good engine rebuilding, I'd say, don't repeat it.
Regarding your rods, as I was admonished to do so by a friendly forum member, all those knicks should be polished out.
Richard L.