Sammy:
A quick solution is to take an empty one quart plastic
oil bottle, spray paint it black and tie wrap it to the front X member. Drop the overflow tube in and you're good to go.
Jim
PS: The alternative, $ way to go is to have something fabricated or search the various race (Pegasus Racing
www.pegasusautoracing.com might be a place to start) car folks for a tank.