Chrome SB Chevy Two-Piece Valve Covers Fits 1958-86 SB Chevy 283-350 Engines Chrome Stamped Steel with Removable Top This Design Allows Adjustment to the Valves While Engine is Running, Keeping Oil Inside Oversize Allen Head Bolts for Easy Removal Will Clear Most Roller Rockers and Stud Girdles Gasket for Removable Top Included. Powered by SixBit's eCommerce Solution. 283 327 350 383 400. The item "SBC Chrome SB Chevy 2-Piece Tall Valve Cover 283 327 350 383 400 Removable Top" is in sale since Tuesday, May 19, 2020.This item is in the category "Vehicle Parts & Accessories\Car Parts\Engines & Engine Parts\Rocker Covers". The seller is "motornets" and is located in Chino, California. This item can be shipped worldwide.