Dodgy UJ's are a defeinite possibility, check as well that the PO didnt fit extended shackles to the back, these will lift the rover at the expense of misaligning the diff angle and the ujs will be damaged by this, and be more of a cause of vibration.

The landy rad and bits are fine for cooling. Benz, the plumbing from the box is probably the inlet from air filter to turbo, the fittings required are a couple of bits of waste pipe fittings and some rubber hose from the car. If you want some fitting details, then my site lists how to do a...