Thanks, Lars. A PM is on its way. I do not have the money to put on a blower now. I am learning from these posts so I can do it right when the time comes.
The Norton blow up was not unusual and I saw it on BSA's and Triumphs, too. One thing I learned a long time ago was to 1) install new cylinder studs at rebuilds, 2) check the nut tightness often, and 3) use the factory torque values. Loose nuts or too much power can cause the problem you see.
My old bikes and the ones I built never saw the salt, but they were raced. It was common practice to check the cylinder nut torques between races. This was done until I was sure all of the nuts would stay tight. Imagining myself racing an old brit bike at Bonneville, I would check the nut tightness before a run down the salt and between runs, too.