OK I think I have tried everything my wheels and tires will not hold air. They are Trigo wheels and goodyear billboards. I began by sealing the wheels with Glyptal paint on the inside. that did not work. then I had the valve stems and cores replaced. No help there! then put nitrogen in the tires --still losing air I even ordered inner tubes but they require machining the wheels to get the tubes mounted to the rims as the valve stems are 5/8" (M/T racing tubes only ones I could find available for tires the size of the ones we run on the car.)

Has anyone had this problem and if so how was it solved?