Cam plug leaking. Removal and replacement?

I put some more thought into your cam plug business. Not only is it in backwards But it's still wrong. Your block is a '72 so it takes the concave cup style plug like what Toolmanmike posted earlier. The "step" where this plug goes on the earlier engine is .225 inch, the later engine the step is .385 inch. Concave cup size is 1.875 inch.