I was wondering if anyone can tell me what the best valve cover gasket would be. One that you can take the covers off and put them back on a few times and not worry about oil seepage. I have a goodwrench crate 350 and have the stock covers that came with it. I removed them ONCE before I dropped the engine in because they had the GM stickers upside down and the oil filler back under the master cylinder, so I simply swapped them side for side. I've only had the engine in for about 30,000 miles, and it's seeping oil on both sides aty the rear of the block. The gaskets are the cork ones. I would spend more for a reusable, no leak gasket. What to do?