It’s no problem at all, I’m just giving you whatever advice I can based on experience.
When you do the 180sx brake upgrade, you just change the front brakes. The rear brakes on a 180sx are exactly the same I guess.
Leave the lines stock, they will bolt right onto the 180sx caliper. However, for a better brake pedal feel, you could get Stainless steel braided lines and apparently those help a little.
The master will remain the same as i’m pretty sure 180sx’s all had the same brake master cylinders as we did, however, 240sx with ABS apparently had a bigger master or a master with a bigger piston or whatever. Someone can prolly confirm that or you can find out by searching.
In my opinion, based on what you are using your car for. Front 180sx Brakes with brand new blank rotors + Hawk HPS pads will be perfect. Keep the rear brakes stock or upgrade them to HAWK HPS or HP+ on the stock 240sx calipers.
You will definitely not regret it. If you live near me, I can take you for a spin in my car.
Oh by the way, the 180sx rotors are much bigger than the 240sx rotors.
I have 16 inch rims and that is how it looks. Unfortunately, i dont have pics of my rear to show you a comparison.