Get the Motive unit that has the 3 prong cap, a universal cap will just leak on you. Go over ALL your lines and look for any fluid leaks under the car, make sure everything is installed properly. Any ABS codes in the system?
As far as options the only real option those years was leather seats or stick or auto and the Mach audio system. If it has all those I guess you could call it "loaded" lol. Loaded is a VERY operative term for a SN95...
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.