On a '60, the GM rear is round in shape (looking from the rear) and has a removable 3rd member. Both the cover and the 3rd member have 10 bolts. The Dana/Spicer rear have a somewhat lopsided hex shape, with the larger end being the ring gear side. The should also have the Dana or Spicer logo and model # cast into the housing on the front. Usually the logo is aslo stamped on the cover. The link I posted shows the general shape of the 44 cover.


Bill Burmeister