My old pile had, for a steering shaft seal/bearing at the firewall, a piece of 2x4 with a 3/4" hole in it! I had it around here somewhere but can't find it now. I'm no Foose or whatever but even that was a bit cobby for me. So my plan is to use a swivel flange bearing on the inside and cut a rectangle out of something to clean up the outside and provide an air seal. What to use, leather, rubber?