Weight: 1.79
Note: 1948/1957 Panhead models require engine case machining for installation of a 1958/1984 style cam shaft needle bearingNote: Rocker arm ratios are as follows, Panhead 1.5:1, Shovelhead 1.43:1. 1980/1981 Shovelhead motors with anything higher than a valve lift of .430" will require valve guide to top spring collar clearancingAndrewsApplication: Street/Drags - Much more mid-range & high end power. Idle smoothness unaffected. The cam for modified 74ci/80ci & small strokers. Spring spacing required.Timing: Intake 26/50, Exhaust 53/25Duration: Intake 256, Exhaust 258Grind: B2, Year: 1948/1969Valve Lift: Shovelhead .485", Panhead .507"By: ANDREWS PRODUCTS INC