As stated before, the only way to really reduce the wheel gap is to lower the car.
Why do you want the car to have less wheel gap? Do you want to do it for performance or aesthetics?
Honestly, if you dad is giving you the car, and it's only for looks that you want to do something, and $600 US for the BAT kit is outside your budgetary abilities, just let it slide.
98 Silver Frost SVT
97 BMW 540I Sport, six speed
"Blue is for sky, black is for soil, and white is for simplicity, purity and hope for the future"
"A coveted car should never stunt your life, but should make it more rich and interesting."
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