Hello...sounds like you've got a great car! Pictures will go a long way in determining it's value. Originality helps alot too! Kaiser used odd materials for the seats, floors and trunks and if it's original and in good shape, then the value is increased. By the way, Kaiser originally used Goodyear tires as original equipment so your Fisk is a period replacement. Fisk tires are not often seen so it does have some value!
The best thing you can do for the car is to drive it. The engine and transmission will perform better if driven regularly, even if only for short drives around the neighborhood. Besdies, with a car like a Kaiser, you can be sure to be the only person on the road with one!