[raytasch]

Not to hijack the thread but here is a K301 with a similar crack that I freshened up about late 1970s or early 1980s. At the time, I noticed a crack and stop drilled it, knowing how cracks tend to just keep migrating. The stop hole seemed to have stopped further extension of the crack. I would venture the engine has possibly a thousand hours on it since the time of refresh. It was just brought out of eight year storage, fresh oil and gas and she fired right off. BTW, the bore is still std and shows just slight wear. I am going to adjust the valves and re assemble.