Small Gasket pieces fell into lifter valley

Hey everyone, I've been re-gasketing my 340 and when I took a wire brush to here the intake rests on the head, and got some small gasket particles into the valley. I had a cloth over it but I got it with the wire brush and it all flew in. Not sure how concerned I should be with this. Will tiny pieces really hurt the motor? Also I got a thin piece of silicone, about 3/4 inch long that fell into the timing cover, should I take that off and find that piece. Thanks!

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