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div 5 · 12-14-2007, 11:41 PM

Got the 48th edition of ND today and it has the picture that is missing from the 2008 rulebook. The way I read it the .250 measurement is taken from bottom of the seat cut but the picture shows it taken from the top. I'm following Bob's advice and waiting before I start my next set of heads.

12-14-2007, 11:41 PM	#2
div 5 Junior Member Join Date: Aug 2004 Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	Re: NHRA Rule Change for Valve Grind Got the 48th edition of ND today and it has the picture that is missing from the 2008 rulebook. The way I read it the .250 measurement is taken from bottom of the seat cut but the picture shows it taken from the top. I'm following Bob's advice and waiting before I start my next set of heads.