Better get the upper control arms to just in case. I hear differnt stories about 73 and later cars
Most agree all the 73 later disk brake cars have the big ball joint. However I read here some of the 73 later drum brake cars may still have small upper ball joints used in them.
Bottom arms will be fine but you will need the correct lower ball joints for the new spindle off the donor car. Or even better a new one form a auto parts store for the year of the donor car.
You want as much as you can get off the donor car and don't loose any bolts or parts the little stuff can be hard to find.