65 Chevy Guy,

I just did this tonight on my '65 C10. Squeeze and Longbox55 were right on the money! There is a slot on the face of the drum, turn the drum until you see a star wheel through this slot...that's your adjuster to relax the pads. Turn that star with a large straight blade screwdriver far enough and hopefully your drum will slip right off like mine did. Good luck!

Tom
1965 Chevy C10, 230 straight six, 2WD, 4-speed manual