Weight: 1.98
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: Hydraulic version of a "B" cam. Usually a bolt-in spring spacing may be required on Shovelheads 1980/1981.Timing: Intake 24/52, Exhaust 52/24Duration: Intake 256, Exhaust 256Grind: BH, Year: 1970/Early 1977Valve Lift: Shovelhead .450", Panhead .470"By: ANDREWS PRODUCTS INC