How much interference is there? If it's pretty close, I'd suggest removing the shoes, glue a piece of coarse sandpaper to the inside of the drum, and scuff the linings into a perfect fit to the drums. That's a good idea on any Huck brake installation anyway, since they don't work well until the lining "wears in" to fit the drum exactly anyway. Use a water soluble glue like Elmer's white glue or even wallpaper paste to make removing the sandpaper with boiling water easier when you're done.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!