Really, the only good way to get the front higher so you have more clearance on the headers is new/different front springs.

From reading a little more about your 'racing brakes'; it is possible that the previous 'racer' owner installed a line lock incorrectly in a brake line. The other alternative is that there is a brake problem and it's hidden behind an excuse that they are racing brakes.

The other problems are smaller and the 'usual' with having an antique car that has had an owner with racing priorities.

All in all, it seems you got very close to what you were promised which is either very lucky or you did a good job buying. Congrats!