ops no 6 spd gear boxes,, ,, evo,,,, lol,,, but im running a 1800 also with tien springs and shock, dont like them as much as koni or bilstein except the tien have enought adjustment to get you in trouble fast, the spring rate is another good question,, it runs the gammot of light to heavy,, with fast cars like andy running heavy front/rear,, depeinding on the track, a good start is 750/450 i guess,, i will suggest the cage made by spec miata,, easy to weld and comes in a kit, cheaper than having one made, im also running the spec miata front sway bar with stock rear bar, i want to try the pnp computer this next year,, as for brakes i guess blues and black is my choice if im wrong with my suggestion, you eastern fast guy tell me so i can get fast too, at 74 i need all the help i can get,