I just got my head for my 49' with a 55' 235 back from rebuild. As I was preparing to re-install it using a copper gasket my dad pops the question did you put a thin coating of grease on the block and head surfaces? I looked at him puzzled.....why? It helps to seal the gasket and allows it to float into place as it is compressed. The way he has always done it. My dad is 83, retired farmer and life long auto mechanic, GM certified. He worked on these old trucks when they were brand new. I don't argue with him.....I have no leaks what so ever.
