In the back if they fit without rubbing the springs and the springs are in the stock location then they won't have more than 5" of back spacing, 8" of backspacing won't fit, not sure what you could get away with up front. It's real easy to check; lay a straight edge across the surface the wheel mounts to on the brake drum/rotor and measure the distance to the spring at approximately the radius of the wheel, that is the maximum backspacing before the rim hits. You need to be less than that to accomodate the side wall deflection and bulge in the tire (you don't need as much with the real low profile tires).
A lot of modern wheels push the spokes of the wheel to the outside but the actual mounting surface is much further back which is where you measure back spacing from. This is done to accomodate the big calipers they use on modern cars.
