Crane's Pushrod Guideplates Feature a Significant Increase In Strength Over Stock Designs. Their Unique Design Provides a More Rigid Guide, Reduces Flexing, Stabilizes The Pushrod and Reduces Rocker Arm "Wander. " All Sets Include 8 Guideplates. Heat Treated and Carburized Pushrods Must Be Used With These Guideplates, Or Premature Pushrod Wear and Failure Will Occur. Cylinder Head Machining and Screw-In Rocker Arm Studs May Be Required To Install These Guideplates. Refer To The Engine Application and Rocker Arm Pages For Additional Information.Pit Stop USA offers Crane Cams 5/16" Pushrod Guideplates - Chevrolet V8, 90° V-6 78-86 200-262 11650-1 at low everyday prices. Be sure to check out all of our products from Crane Cams including Crane Cams Pushrod Guide Plates - Small Block Chevy.