Several aftermarket racing equipment suppliers sell replicas of the Corvair load-spreaders, but you'll probably have to modify them for clearance around the dimples in the stovebolt valve cover. I've used them on Chevy roundtrack engines for years. Try researching the Mr. Gasket brand name for the load-spreaders.
Edit: The Mr. Gasket part numbers for 4 different types of spreaders are # 6394, 6395, 6396, and 6397.
Jerry
Last edited by Hotrod Lincoln; 03/06/2008 5:02 PM.