Remembered one other imPortant detail. Unless these have been modified, the trigger voltage is too high for 35mm cameras. The trigger voltage is 90v if I remember correctly and will fry the contacts in a 35mm or DSLR. You can get a device called a safe sync which is a tiny transformer that plugs into the strobe and limits the voltage. 90v is fine for copal, compur, prontor and ilex shutters but not others.
Remember these are old units. They were around in the early 80's if not earlier. If you question anything contact Speedotron in Chicago. They're great folks and reasonable and fast on repairs. You might feel better just getting it checked and brought up to date.
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