Help! Amateur Mistake $$$

[dubKustom]

Elev8_dude: How did it work out with your tires?

I have the exact same situation on my -69: stock beam (with adjusters, but at full height), CB 2,5" drop spindles and 15" diameter, 5,5" wide wheels with 185/60 tires. They have just enough room to rotate, but when I drive it it will certainly rub the fender at every bump or stop...

I don't want to narrow the beam, so I was thinking about two things: either getting a smaller tire (like 165/60 or something similar, maybe Smartcar?) and/or machining off some material on the inside of the wheel to move it inward.

Any other ideas anyone?
/Daniel, Gothenburg, Sweden