Definitely good questions to ponder. Or even an heavy duty conversion like below ... does it work well without the balancer due to the heft of the upgraded components?
http://www.fourwheeler.com/how-to/t...807-super-duty-jeep-transfer-case-conversion/
The article you posted is quoted with, "What’s the difference between heavy duty and super duty? Well, the Tom Wood’s Super-Duty 231 conversion kit comes with the manufacturer’s unique rear output flange that allows the installation of a 1210, 1310, 1330, and 1350 series driveshaft with a conventional two-joint CV (double-Cardan) setup, or a 1410 seriesMorris 4x4 still sells new ones!
https://www.morris4x4center.com/damper-np231-transfer-case-5017819aa.html
Also, wish we could ask @mrblaine his thoughts on the topic.
Tom Wood may also have more information it seems. @bobthetj03 , would you mind writing a note to Tom Wood on this subject? You can just point him to this thread perhaps. Or PM me his email info to me and I will write an email.
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conventional two-joint driveshaft, all without changing the flange."
JB Conversions still offers the rear output companion flange yokes (far better than a eared yoke IMO on many fronts) on their 32 spline output shafts for the SYE on both the 231 and24transfercases.
http://www.jbconversions.com/products/yokes_flanges/1966.php
Like you pointed out what @mrblaine mentioned on another site, if the factory designed and engineered it, it might be in best interest to keep it or re utilize it. Like I have mentioned before, I am a huge fan of companion flanges over typical eared flanges both on output shafts and pinion shafts.