Car in good nick, i.e. the underside isn't rusted solid from 30 years of inattention? If so, then just jack up the car, remove the drag screws and the locating plates & springs (noting which way the locating plates are — 50/50 chance they are wrong as Harvey often points out, check out his posts for the right way round) and knock out the outer pads. Inners should now come off easily.
And that brings you to the tricky bit — winding the adjuster back in. If you happen to have the proper tool, you're golden. If you don't, it's awkward but doable with your fingers. Wind it until it starts to click, then position the tab at the top. If that is a lot of trouble, then you might want to take the disc off for better access.
After that, it's put it back together and crank on the handbrake lever until the adjuster takes up the pad gap.
Yours
Vern