Rear suspension components overhaul?

[notorious]

>> Notorious - I've never seen any as bad as that one of yours.
>> It looks like it was torqued up with an impact wrench at some point in its life?

I was on genuine untouched suspension since new. Touched pinch bolts for the 1st time this year when I changed all arms. 1st owner lived in Scotland (this is where I bought the car in 2010), so salty roads for 8 years of 1st ownership. Pinch bolts were removed very carefully and corrosion was noticed where the upper tapers are. After 4000 miles after changing upper arms I noticed that the taper wobbles in the upright. Perhaps OEM specified torque was not enough to hold it properly in place due to corrosion. Tightening as much as possible didn't solve the problem since the hole was already worn too much with all the wobbling. Since there was no donor car in the whole world with cast iron uprights I made strategic decision to change everything to brand new (thanks God, all parts are still available!).