Thread: enlarging the intake valve reliefs

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well that about right or Nos would be thicker i have cut down for lower ch and recut pistons from big chief to 24 angle low buck job for a friend and have a punch that is made out of a old valve to find center to fly cut on the hi 700 to 800 lifts i have cut some set for the bbc the old trw you had to cut them all the time cutting thru the ring land on the intak side is the deal on a bbc alot of the fly cut is over the pin boss so you will see the ring land first be for you see a rod that a why i like to do them out of the engine i can check how thick the piston is were i am going to fly cut .i knew a guy that used a 4 1/2 angle grinder to trim the ex side of a 427 bbc the hands of a surgeon he did not have