Here is what I have for the 66 425 from an old Dennis Manner article in the GS-X-tra:<P>Part # 1368090<BR>Shank # 1362241<BR>Exhaust Duration 295*<BR>Exhaust Lift .431<BR>Intake Duration 295*<BR>Intake Lift .431<BR>Lobe Sep. 114*<BR>Overlap 67*
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Steve B.
67 GS 525 Buick Stage IV
66 GS Convertible
65 GS
63 Riv
03 SVT Cobra Convertible