i had a set of crap chrome valve covers with the center bolts and the gaskets would not stay put long enough to bolt them on!!! try different valve covers!!! find a good set of aluminum ones if possible!!Can anyon give me any insight on valve cover gaskets for a centerbolt 350 valve cover. I keep getting leaks from the rubber Felpros. I can't seem to keep the gasket from popping out of of the corners. I've used silicone and no silicone. Is there a trick?