New seals, pistons, dust boots, should be fine.
If your redoing this brake system w all new stuff might i recommend using DOT 5 silicone based brake fluid. It will not eat paint if spilled on it, and will not wick up moisture causing line rot or sticking pistons and wheel cylinders over time like DOT 3 will.
These 2 cannot be mixed, so i would recommend placarding the master cylinder as such if you do this so you dont mistakenly cross contaminate the system later on with DOT 3 by accident.
We did DOT 5 on my dads lil red express when we restored it. Absolutely no difference in brake pedal feel or grab compared to DOT 3.