Are we talking about 4.2's or D2's [bigwhistle]
I had a Nissan with a 4.2 in it when I bought my D2a and I gave it to one of my sons.
Since then he has had to put new tyres on it and a new battery, I on the other hand have spent about 20k getting my D2a up to scratch.
I am pretty certain that rust will stop that Nissan Way before the engine does.

