FelPro # 1604 5/16" thick gaskets ( perimeter bolt heads ) . Also i would get a set of the wide valve cover support bars . Valve cover to intake runner interference is very common, normally there is enough material on intake to remove for clearance. Pre fit to check interference ,modify , then...
As a former NASCAR engine builder doing 450 plus engines a year , 3M weather strip adhesive was the preferred method to glue FelPro double cork metal reinforced gaskets to the covers . Never use RTV . Using the mention method you can remove covers ,set valves if needed and reinstall without...