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X-TECH MAN · 09-03-2010, 03:00 PM

The 1964 427 Hi Riser engine has 2.197 intake valves and 1.725 exhaust valves. Does the NHRA (Dave Wren Hemi) rule still say Plus .005 and minus .015 tolerance allowed ?

09-03-2010, 03:00 PM	#4
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,203 Likes: 1,047 Liked 235 Times in 110 Posts	Re: "Live" from Indy! 2010 The 1964 427 Hi Riser engine has 2.197 intake valves and 1.725 exhaust valves. Does the NHRA (Dave Wren Hemi) rule still say Plus .005 and minus .015 tolerance allowed ?