Well I purchased the 4.2L valve cover. I checked the fit, all was good, then I cleaned up everything and put RTV and Gasket on and installed cover. All went well except the 5/16" X 1/2" long allen head bolts were not long enough to thread up in the holes on the drivers side. So I snugged all the other bolts up and let the RTV cure, I am getting longer bolts for the driver side today. Question do you think the cover will leak since I was not able to snug the drivers side up while the RTV was curing? SHould I try it or go ahead and redo? If I cant get 3/4" long bolts do you think 1" will be ok with washers stacked up?