Rear End
My 71 Polara in my avatar had been sitting in a junkyard for close to 30 years. When I was working on it to get it back on the road, I pulled the pumpkin out expecting to find at least flash rust on the gears that weren't in the oil. It was perfect. No rust, clean oil, the axle seals were nice and pliable. Since I had it out, I decided the put one of my 2.76 SureGrips in to replace the 3.23's, I do quite a bit of Interstate driving.