Thread: Big block valve train clatter

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the welded sheet metal valve covers can hit the rockers arms ? some rocker are wide body and will hit valve covers you need to round the rocker body with a belt sander and wash the rocker very good it s the intake rocker . if rollers they have a alum lip that hang under the rocker pushrod side of rocker. the dripper if m/t valve covers hit if you use roller rockers .i drill the front plugs but that helps to but if it clatting that bad could be more then air .i seen a bbc did the same thing the oil pump cover was falling off. i pre all the block for the O rings from msd that keep oil from moving past to dist hole in block never seen much more for the spray shot for dist gear oil