valve, comp, and press switch wiring

my FBSS 3-wheel can kit should be arriving soon, i have a total of 10 valves, one comp, one press switch and one relay. approximately(SP?) whut gauge wiring will i need, and how many feet of it to wire everything? my car is approx 17ft long and the tank/rear valves will be mounted in the trunk and front valves moutned in the engine compartment.... thanx for ur help