These valve covers are on special because of discolorations and porosity.
The discolorations are on the sides.
The excessive porosity is on the corners. Porosity is small pinprick holes from tiny air bubbles in the casting process.
For reference, see our regular Chevy Small Block, Perimeter Mount, CORVETTE Script and Fins Valve Covers, Polish, PML Part Number 11026.
For a gasket, PML recommends one make of cork or cork composite: small block Chevy gasket
These valve covers can be machined for PCV, breather and oil fill holes. There is a machining charge. Holes must be ordered over the phone for specials. See this PDF for details before calling or emailing.
This special should fit and function like a regular part.
This is sold as-is and cannot be returned. Please call to order.
The top view of the valve covers.
Inside image of valve covers.
Large amounts of discoloration and porosity on first valve cover.
Small spot of discoloration on second valve cover.
Small spots of porosity on corner of second valve cover.