I have a 89 with the 2.9 and have had the gaskets re-done a couple of times in the last 20,000 miles. Last time I took into my mechanic he said these valve covers were prone to warping and just putiing a new gasket on would probably leak too. Is this a common problem with the 2.9's? is there any resonable aftermarket valve covers for the 2.9's?

Thanks, Darcy