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The gasket can be put on either way. All the bolt holes and steam holes work out. In many areas of the "N", there is only one way to put things together; if you look at the parts carefully and think about the problem. Unfortunately, the head gasket is not one f them. I asked the same question a while back, in my case with a FNH gasket which is a little different than the Tisco gasket, but presents a similar issue. Mark H aka Willy N gave the only response. He reported good results with the rolled edge down (one year on his engine). The FNH dealer's mechanic suggested the opposite, but wasn't particularly sure. A couple of Ford Flathead (V8) sites suggested that it didn't really matter (iron head on iron block). If your sleeves stand slightly (.001 to .002 inch)
proud (above) the block, it made sense to me to put the flatter side of the gasket against the block, with the rolled edge against the (flat) head. This creates an O-ring effect on each side of the gasket, promoting better sealing of the combustion chamber pressure. This was perhaps thin justification, but replacing the gasket isn't that bad of a job, so I thought I go with what "felt" right to me. So far, rolled edge up has worked for me. But I've only had an hour or so of run time on the engine.
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