5 bolt valve cover leaks

Well after looking closer sat. I think i got it but wont know till we run again, the towers for the bolts measured 3-3/4 and when i screwed the bolts in without the cover on it measured from the head to bottom of bolt 3-3/4 so we added two small washers under bolt head for more clamping pressure on the gasket and also put a skim coat of ultra black between gasket and head-steve