There are two flashers. The early one is 4 pin connection and the late one is 3 pin (Tridon Stant EP 35). In April 1972, the 4 pin type was still in use. The 4 pin type will need a conversion to use the Tridon Stant EP 35.
SOBill has done all the thinking for us again on this one.
Details are on Mike Dailey's great site:
http://www.panteraplace.com/page107.htm
(from Barry Seib Oct. 29, 2012)
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