Anyone have a solution for sealing the four screws that secure the valve cover on a 1955 235? I'm using a flat machine screw head, external star washer, and the stock spreader washer. Lately, I've been getting some oil in the external ridge of valve cover that finds its way to the rear of the engine. Here's an old pic, zoom in and you can see what I'm talking about. Would an o-ring solve this leak?
