I used the Harbor Freight knock-out hole punch to install the SS pass throughs into the fire wall. Worked very well after adding a little oil on the threads and sharpening the edge. I then drilled the four attach holes, added 2000° fire-sealant and tightened it all with the 4 SS screws and self-locking nuts. I had time to paint my air filter box. I primed it a few days ago with epoxy paint and today I gave it two coats of Lycoming 500° enamel paint that matches the engine.
