Hello, I was curious are the wilwood brake kits for standard braking only? Or can they be used with a factory power brake system? Also is anyone use the pro kit on the street? http://chucker54.stores.yahoo.net/wiprostbrki.html Because Jegs suggests on their site not to use them on cars over 2800lbs. And I dont know many street mopars under 2800lbs. Thanks in advance