I'm constantly amazed at how many people fall into the idea that the povo transverse leaf set up on the 1000 series is no good!
Sure it's primitive,but once understood it can work a treat....and cheaply.
The work involved in the fabrication(that actually works)of a new front end set up is complex and time consuming exercise and should only be attempted by people with the appropriate level of experiance along with a very healthy budget,added to all of this is the engineering required for legal road use,or alternatly for motor sport(CAMS) you cannot compete unless in a Sports Sedan class.
Having done this exercise many years ago along with on going development at the time i can report that the effort did not come close to the ultimate results expected.
As for the brakes,grab yourself some Hyundai Sonata rear rotors(ventalated)and shove them straight over the top of the 1000 hub(same stud pattern)which will sit inside the rotor centre,grub screw to the hub or leave "floating"your track will increase by the width of the thickness of the face of the rotor centre,which is good.
If using 13" wheels you can get a laser caliper inside with a little grinder relief hanging off a fabricated bracket or if bigger diameter wheels a BMW caliper or Holden is a good choice.
The old B10 was able to out stop every car it ever competed against with the above set up with laser calipers.
It also used one of those horrible transverse leafs