I got some new Goodrich original bias plys for my 1965 C10 and they were mounted tubeless. Well 2 of them are holding up fine, but two of them won't stay inflated. The guy at the tire store said that the problem is that the valve stem holes in the wheels are wallowed out too large from rust or whatever. He is going to put some tubes in them to fix the problem but he said they would not be good for high speed or "interstate driving."

Has anyone else had this problem?

Thanks

Kevin
1965 Chevy C10 Longbed Fleetside