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I cannot see anything abnormal looking in the pic but there should not be any sharp edges in the cam profile. If there are I would think you need a new cam. Dirty oil could wear off the highest parts of the cam lobes. I probably would try to adjust the clearance and see what happens.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.
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