What spec is the tubing used for the brace then?
You've got a lot of work to do there still - you need a spot-weld drill and then you can remove all those unnecessary brackets.
Just replacing the current brake fluid with new off-the-shelf cheap fluid from a local motor-factor is your best bet - don't bother with super-fandango fluid as the important thing is (like oil on track cars) that it's changed regularly.
New, clean brake fluid is what you want, as it'll be free of water, which is why old brake fluid boils, as it sucks it up over time.
P*ssing about with spacers is a fool's errand as on track you'll soon find out they're slightly out of balance and give you a confidence-destroying wobble under hard braking. Seen it before and seen people amazed that the wobble goes as soon as they're taken off, allowing the owner to enjoy the car far more.
