Posi rear end. Not all GN's have posi.
The Goodyear tires are old but have less than 10,000 miles on them.
I replaced the tires with the same tire and size as the original. Goodyears.
I have replaced so many parts over the years.
I have a stack of receipts.
These are just some in the last few years:
Water pump, belt tensioner, hoses, complete rear brakes, plug wires, battery, alternator, starter, belt, power antenna, radiator, and more.
I replaced the windshield. It was pitted.
I replaced the windows sweeps just last year.
I replaced the door hinge bushings, no sagging doors, so the doors shut just like new.