My 292 came back from the machine shop minus the expansion plug in the right head (opposite the temp sender in the left head). Of course; I didn't discover this until the engine was assembled, and installed. The parts places just give me a dumb look when I ask about a new plug. Anybody know the size of this plug; and, where to buy one? Thanks for your help! Brett

 

I don't have the size handy. It should be a standard size. Measure it and look for one based on that dimension.