Check how many bolts hold that clutch pressure plate to the flywheel. A true heavy duty clutch uses 9 bolts versus 6 bolts for the standard 9-1/8 inch clutch used on on stovebolt engines. Replacement 10 or 11 inch (can't remember which one) clutches are extremely hard to find, so if you have a 9 bolt flywheel you'll either need to replace it with a 6-bolt one or get it drilled and tapped for 6 bolts (smaller bolt circle.)
But yes, unless the flywheel has real deep cracks in it, it can be resurfaced and reused.
BTW, EVERYTHING is harder than when we were 60.
Maybe find a youngster to help you.
[on edit] As you found out, adjusting the pedal linkage won't cure a slipping clutch. Yours was bad right out of the box.
