I have a 3 liter motor that had the heads prepared by Sperry sveral years ago. The engine sat for several years after the heads were done. I discovered that one of the cylinders had low compression so I removed the head and found that a valve wasn't seated properly. After repairing this I discovered that there are no valve seals available for the different size valve guides that Sperry used. Does anyone know where I can find these seals? I've tried Ereminas and several machine shops to no avail.