1980 GTBi stock 14" wheels changed to 16" stock factory QV wheels. According to local experts, the 16" x 7" front wheels are porous and loosing air. I bought the set off eBay from a wheel refinisher in San Jose who did an all too wonderful job of cleaning and repainting - I added new tires. My tire dealer and local wheel houses finds tiny bubbles at wheel body. The wheel men say working cast metal will only make it worse and perhaps lead to wheel failure. Tire men say inner tubes are a no-no with radials, added heat leads to failures. One wheel quit leaking badly but the other continues at about 1 psi / day I feel there should be a fix. Seems to me some type of goop could be brushed onto to the inner wheel which will at least slow down the leak to 1psi / week. Anyone have successful experience in this area? Incidently, the original 14" set is available.