whats the smoke coming from?

hi guys,

i was driving on the freeway the other day, when all of a sudden, i smelled a weird burning that I've never smelled before....it wasn't coolant, it wasn't oil. When i got home i saw smoke coming from the rear left wheel. when i took the wheel off and inspected the drum brakes and all the surrounding area, i found no signs of drips or leaks in the break lines. just for good measure, i replaced the wheel cylinder and shoes. I drove the car around my neighborhood for about 20-30 minutes... at the end of the cruise test session, i noticed the smoke and smell yet again. I don't know where to go from here. what could this mystery smoke be coming from? again to try and describe the symptoms....appears to be coming out from the wheel and wheel well. i cannot see or visualize anything dripping or leaking at this point. if you guys have any ideas please help me out. thanks!


this is on my 1971 edge dart swinger
7.25 rear end
10" drum brakes
stock