620 1979 conversion (some info wanted)

[DatsunPY]

Hi everyone.
I've been looking for a 1200 ute for a while now. (No luck do far)
So I am in the process of buying a 620 1979 king cab.
I am going to buy it this weekend if everything goes as planned.
I have driven this 620 (drives pretty good) the body seem to be quite good for its age and its running a l20 engine 4 speed manual.
If i end up buying it (90% chance that i will) i have some questions to ask before i go ahead and close the deal i hope you guys can help. I am wanting to know how difficult or should i say how easy/expensive would it be to make the following changes.
1- Power steering conversion (possible/cost)
2- Cheap easy options to make current engine a bit faster.
3- Improve brakes.
4- Low suspension.

Would be much appreciated if someone can help/share info.

Cheers

[Rusty]

Why power steering did it feel like it needs every Datsun Iv had and driven didn't feel like it needed power steering.