Not having any of the cars which offered Rex, I can only say this piqued my curiosity. Just enough to go poking around on VADIS, because heretofore I had assumed the cam-mounted distributors would all take the same rotor and cap, whether Bosch (EZK) sparked or Bendix (Rex) sparked.

So far my poking around reveals only one part number for what Volvo calls the "distributor arm" and everyone else in the free world calls the distributor rotor: p/n 1346787

I always thought the only differentiation was between block or head mounted distributors.

What part number didn't fit, is my curiosity...
--
Art Benstein near Baltimore

Back during the days of the former Soviet Union, a fellow by the name of Gerald Chattington had a friend by the name of Rudolph Nosov in the Soviet Embassy, who would drop by occasionally. One evening, Gerald and his wife, Peg, were sitting in the kitchen chatting when Gerald looked out the window and said, "Look, it's snowing." Rudolph looked out and said very quickly, "No, I think it is just rain." "I'm sure it is snow," insisted Gerald. "And I am just as sure that it is rain," said Rudolph. At this point Gerald turned to Peg to settle the argument. Peg looked out the window for a moment, then said, "Rudolph, the Red, knows rain, dear."