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LunatiVoodoo Rocker ArmsThese extruded aluminum rocker arms (PN 84161) from Lunati [www.lunati camshafts.com; (662) 892-1500] feature a laser-etched Voodoo logo on a black-anodized finish. They utilize a 7/16-inch mounting stud, have a 1.65:1 ratio, and are a good choice for a high-performance Ford 351C engine. They have a C-clip-retained roller tip and feature a large-diameter trunnion. We found a set for $337.39. Other Voodoo rocker arms include small- and big-block Ford in 3/8- and 7/16-inch stud mounts.