I have a Kohler k241 that I recently acquired. When I bought it I was told that it was rebuilt and bored .030 over. It came without head bolt and a head gasket, but there were 2 head studs in it. One came out relatively easily, but the other is pretty well stuck. I have tried penetrating oil and I do not want to heat it because it is right next to the exhaust valve. Would it be a big deal to just put a spacer on top of the place where the bolt head would go and just put a nut on it? Thanks