The original carb was completely stuffed so I replaced it with downdraught weber from a Cortina. Works heaps better, but had to downsize the jets because it was getting too much fuel.
When the A12 motor began to drink oil I replaced it with an A14. It now has bags more power and better economy because it's not having to work so hard.
Car gets hot so I fitted a thermo-fan, but this has not made much difference. I hear that a Gemini radiator is the perfect swap, it has the hoses in the right places, and once you have done this conversion it never gets hot.
There isn't much leg room in this car even in the front. Very uncomfortable.
They have the worst body roll in any car I've ever driven, but handle OK. Can be quite frightening for the passengers though.
Will beat Falcons and Commodores up hills - no joke.
I've never had any problems with this car except for general wear and tear and that godforsaken rust that all Datsuns seem to be plagued with.