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R. Thorne · 08-08-2010, 06:30 PM

Bill, the most important rule change was intake modifications (inline as opposed to traditional cross ram) that prompted higher rpms which led to very stiff valve springs which led to etc.

08-08-2010, 06:30 PM	#14
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 62 Liked 100 Times in 33 Posts	Re: new rules for '68 Hemis Bill, the most important rule change was intake modifications (inline as opposed to traditional cross ram) that prompted higher rpms which led to very stiff valve springs which led to etc.