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Think about what it would look like if you went over to the bench grinder, ground down the lobe and lifter, collected all of the particles and then poured them into your engine. Once the cam is wiped, a rebuild is in order. As far as the 5.3L or 6.0L swap, not knocking it (pun), but everybody and their brother has done it. We're at a point where it is refreshing to see period correct engines under the hood too.