When mine did that I intially put the old cover back on but ordered a new timing cover (I left the head on that time). About 2 years later when doing a HG replacement a slapped a new Timing cover on there. Think it cost about $50. I think the shavings from the chain-on-cover will be tiny, hopefully stuck to the drain magnet. The timing chain guide pieces are in the bottom of the pan though!!

89 xcab 4x4 22re. 1.5" BJ spacers, 3" shackle and AAL + fender trim. 33x12.5 R15 MT/Rs, 15x10 rockcrawler streetlocks. 488 yukons by ZUK, detroit rear and true-trac front. 2 1/4" cat-back exhaust. Redline gear oil. Rear bumper by bentup.com.