ok i got a 1993 honda civic hatchback cx with stock brakes right now. looking to upgrade to spoon front calipers /w 4x114 prelude rotors redrilled to 4x100 and also upgrading to 1996 integra rear disk brakes. with this upgrade will i also need to upgrade to like integra brake master cylinder and proportional valves also or can i just still use my stock ones??? the reason i say this is cuz if it is not neccasary then it would be good for me to save some $$$ plus my brake master cylinder is also new.