. . . Comments here and on other forums have left me thinking there could be an out-of-box failure rate with the Chinese made condensers as high as 50%. This seems unbelievably high even for China.
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My experiences in the late 60s and early 70s : the american made 216/235/261 condensers had a relatively high failure rate (maybe it was just my bad luck).
I have always carried a spare condenser (and, a spare "configured" complete distributor and set of ignition wires).