Alpine SCs are no longer being made, very hard to find and therefore very pricey when on the rare occasion they go up for sale. Tone is no longer with us. He sadly passed a few years back.
As for your intake...I am pretty sure the MT intake is not certified. He was a small home business and carb certification is quite expensive. If I were you I would put your stock intake on, get inspected and the put the MT intake back on.
As for brakes. Give the sight a search. There is plenty to read on the subject. No "big brake" availability but S'S brake lines, slotted rotors and a few other mods are available.