owned a cadet s13, had no digital stuff at all. No HICAS either...
and 180sx sr20det
Sr20 all the way for power to be honest over a ca.
Nice cars, and handle great.
Power, if you want a rev limiter smashing machine rb's are probably better imo and I have never owned a skyline.
But in saying that have driven a few.
180s are good, and 5 stud conversions are easy.
Get some HUBs from the states, they do complete kits way cheaper and better quality than you can get for the same price new in oz.
Get s15 rear discs (By the new for about 120-150) They bolt up to your rear brakes. Get gtst discs and calipers for the front, and you have 5 stud for around 600 bucks or less.
Then you can get any wheels you want!
Enjoy if you get one, they are light, and nice cars to take to the track as well.
Your compression should be around 145-160, or above. depending on how new the engine is. Oh and def get rocker arm stoppers!