started my 380" today on test stand ...sounded great and started cam break in until valve cover leaks shut me down 10 minutes into run. Problem is running 3/8" spacers in mooneyes valve covers to clear the polylocks on the rockers....I AM LOOKING FOR SUGGESTIONS to do away with the spacers...is there a better option than the way too long polylocks. Are the almost 3/8 thick edelbrock gaskets a possible way to go? Please help me. thanks