Chevrolet® 396, 427, 454, & 502
Big Block, Raised CORVETTE® Script
Tall
Valve Covers

P/N 11042

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Dimensions: Click here for dimensions. A separate window will open. Please check for clearance issues with firewalls, brake bosters, alternator, air conditioning brackets, and the like.

Finishes: Read about finishes and construction of PML parts.

These PML big block Chevy valve covers feature sand-cast aluminum construction with baffles to prevent oil leaks and classic CORVETTE® script and fins. The valve covers have PCV and oil fill/breather holes cast in.

These big block engine Corvette covers do not have a brake booster cut-out on the driver's side in response to customer requests. (If you need a brake booster cut-out, please see our stock height big block valve covers.)

They are 3/8-inch taller than our standard height covers to fit over many roller rockers, such as Jesel. Read under installations below for possible modifications. If you have the stock valve cover, a simple check can be made to see how much clearance you need. Set the cover on the head and measure the distance between the gasket flange and the head. Our cover is approximately 3/8" to ½ taller then the stock cover. Click for dimensions.

The covers use stock grommets and gaskets (not included).

Click here for a pdf file of a flyer with pictures of PML standard and tall big block Chevy valve covers. A separate window will open and load the pdf file. Since these valve covers are new, this flyer does not yet include these covers.

Installations

On 283 Grind Thumpr Comp Cams

Mike purchased PML valve covers for his big block engine on his 1930 Ford Coupe street rod. He also upgraded his Cam and roller rockers. His cam is a 283 grind Thumpr from Comp Cams and the roller rockers are a generic kind, gold in color and very squared off. He used a standard gaskets, not extra thick.

To get the PML covers to fit, he rounded off the left side corners on two of the roller rockers. The valve covers fit great after grinding a bit off the roller rockers on #1 intake and #6 intake (one intake rocker on each side of engine). He did not remove any material from the valve covers. He was told later by an engine machinist that this procedure is virtually always necessary when you try to put roller rockers on a big block chevy.

1973 Corvette with PML Valve Covers, Polish Finish

Click on image at left to see a Flash slide show of these valve covers installed on Chuck Younger's 1973 Corvette with a Chevrolet big block engine. Chuck's company is Walden and Younger Corvette Restorations out of Alabama.

1963 Corvette with PML Valve Covers, Polish Finish

   
Above images show a restoration by Alloway's Hot Rod Shop with PML's tall big block CORVETTE valve covers, polished.

PML Valve Cover Features

• Strong sand-cast aluminum construction
• Thick side walls and gasket flanges that will not bend when bolts are tightened
• Cast-in internal baffles
• Mounting hardware included

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Learn more about finishes and construction of PML parts.

General Motors Trademarks are used under license to PML, Inc.