any ideas?

I picked up my axle today, it's a Dexter#9 with 22.5deg down angle. When I ordered it, they asked for the frame width which is 60in, that is fine. I ordered a an axle 74in face to face, which takes into account the offset of the wheels with a 2in gap between the wall and the tire that is fine also. What I didn't know was the distance from the bracket to the swing arm is only 1in. My walls are 1in so it will be a tight fit.
Any ideas? One that came to mind was to use the router and rout a recess along the swing arm travel (a pie slice shape) then glass and epoxy it for protection from moisture.
Any ideas? One that came to mind was to use the router and rout a recess along the swing arm travel (a pie slice shape) then glass and epoxy it for protection from moisture.