The upper ball joints from the factory use 4 rivets. If the rivets are still there then they need to be drilled out. The new ones come with bolts instead of rivets. It also may be bolts already if they have been replaced in the past. The bottom ball joints need to be pressed out and pressed in STRAIGHT!!! As stated your best bet is to rent one from your local parts store. They are relatively easy enough to replace. You will also remove the front axle and drop the spindle for access to replace them. Good luck