Crower 73682-1 Features:

Crower 73682-1 Enduro Centerline stainless steel stud-mount roller rocker arm for Big Block Chevy 396-454 applications 1.65 ratio with 7/16 in. stud size and .050 in. backset trunnion for corrected valvetrain geometry on modified engines Single-piece, heat-treated 17-4PH stainless steel body with oversized needle bearings and alloy steel tip roller Provides 1.560 in. maximum spring diameter clearance and uses a polylock rocker arm nut style for secure adjustment

Centerline Rockers Chevy 1.65 Ratio .050 In. Backset Trunnion Features:

• 1.65 ratio, .050 in. backset trunnion for corrected valvetrain geometry on Big Block Chevy 396-454 applications with longer valves and proper half-lift alignment
• 17-4PH heat-treated stainless steel, single-piece full-roller construction for high-strength durability, reduced flex, and long service life in high-RPM use
• 7/16 in. stud-mount design with polylock rocker arm nut style, sold individually for custom builds, replacements, or mixed valvetrain setups
• 1.560 in. maximum spring diameter clearance supports aftermarket cams and large-diameter springs while maintaining rocker-to-valve centerline contact
• Oversized needle bearings and alloy steel tip roller help reduce friction, minimize valve guide wear, and promote more accurate valve timing