UPDATE: Was for sale on eBay
Here’s a rare Husky Overdrive.
“Overdrive unit for 29 tooth 6 spline transfer case. Known to be working. Here is a good resource for your application. http://hermtheoverdriveguy.com/?page_id=883
Buyer to be sure this application is correct for your use. Sold with unit only. No shift lever or linkage parts.”